Autism Fast Facts | CNN



CNN
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Here is a look at autism.

Autism or autism spectrum disorder (ASD) incorporates a group of neurodevelopmental disorders causing impaired communication skills and social skills. ASD generally starts before three years of age and lasts a lifetime, but early intervention plays a role in treatment and progress.

ASD is about four times more common among boys than girls, according to the Centers for Disease Control and Prevention (CDC).

ASD can be found among all races, ethnicities and socioeconomic groups.

The prevalence of ASD in the United States is about one in 36 8-year-olds, according to a 2023 CDC report.

Health care costs for children with autism are four to six times greater than medical costs for children without autism, according to research published in the Journal of Autism and Developmental Disorders.

April 2 is World Autism Day.

There is no definitive medical test to diagnose autism. Instead, the disorder is diagnosed by observing a child’s development.

According to the CDC, signs of autism may include deficits in social communication and interaction in a variety of contexts, difficulty engaging in back-and-forth conversation and an absence of interest in forming friendships with peers.

The debate over whether autism spectrum disorders are caused by vaccines started in 1998 when the medical journal The Lancet published a now-retracted study by researcher Andrew Wakefield linking the MMR vaccine to autism.

Most of Wakefield’s co-authors withdrew their names from the study when they learned he had been compensated by a law firm intending to sue manufacturers of the vaccine in question. In 2010, Wakefield lost his medical license. In 2011, the Lancet retracted the study after an investigation found Wakefield altered or misrepresented information on the 12 children who were the basis for the conclusion of the study.

Other researchers have not been able to replicate Wakefield’s findings. Several subsequent studies trying to reproduce the results have found no link between vaccines and autism, including several reviews by the Institute of Medicine.

Early 1900s – Autistic characteristics are studied as symptoms of schizophrenia.

1938 – Donald Gray Triplett of Mississippi is first examined by child psychiatrist Leo Kanner of Johns Hopkins Hospital and later becomes the first person diagnosed with autism symptoms.

1943 – Triplett is identified as “Donald T.” in the paper “Autistic Disturbances of Affective Contact” by Kanner. The paper elaborates on the idea that autism is related to lack of parental warmth; this is later dubbed the “refrigerator mother” theory.

1944 – Hans Asperger, an Austrian physician, publishes a paper about autistic syndrome. The paper gains wider recognition when it is translated into English in the early 1990s.

1964 – Bernard Rimland, a research psychologist, publishes “Infantile Autism: The Syndrome and Its Implications for a Neural Theory of Behavior,” which contradicts the “refrigerator mother” hypothesis. Kanner is the author of the foreword.

1965 – Rimland founds the National Society for Autistic Children (now the Autism Society). He later establishes the Autism Research Institute.

1980 – Autism is classified separately from schizophrenia in the third edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III).

December 18, 2007 – The United Nations adopts a resolution declaring April 2 World Autism Awareness Day.

October 29, 2014 – The medical journal Nature reports that scientists have identified 60 genes with a greater than 90% chance of increasing a child’s autism risk.

December 17, 2015 – Scientists at Harvard and MIT announce they have found, for the first time, a link between autistic behavior and reduced activity of a key neurotransmitter, a type of brain chemical that enables the transmission of signals across neurons, allowing the brain to communicate with other organs.

April 21, 2016 – The Simons Foundation announces that it is launching an autism research project called SPARK. The study, which involves scientists at 21 hospitals and university clinics, will focus on the possible connection between genetics and autism. Parents of children with autism are invited to sign up online and participate in the study. The group also works with Autism Speaks and the Autism Science Foundation to run the Autism BrainNet network, which is an autism brain bank that collects postmortem donations.

February 2017 – Researchers find that monitoring MRI brain scans of infants may help predict whether they will develop autism, according to a study published in the journal, Nature. The researchers found a possible link between brain enlargement during the first year of life and an autism diagnosis at age 2. This builds on previous similar research.

March 19, 2017 – CBS News’ “60 Minutes” profiles “Sesame Street’s” newest Muppet character, a girl named Julia who has autism.

April 11, 2017 – A study published in the American Journal of Public Health finds that people with autism are three times more likely than the general population to die because of preventable injuries, and children and young teens with autism are 40 times more likely to die from preventable injury than the general child population. Suffocation, asphyxiation and drowning are the leading causes of fatal injuries among people with autism.

March 26, 2018 – According to a study published in JAMA Pediatrics, children with autism spectrum disorder and their younger siblings are less likely to be fully vaccinated than children unaffected by autism.

March 4, 2019 – A study of over 650,000 children published in the journal Annals of Internal Medicine shows that the measles, mumps, and rubella vaccine does not increase the risk of autism and does not trigger autism in children who are at risk.

April 29, 2019 – A study published in JAMA Pediatrics suggests that children can be screened for autism spectrum disorder at 14 months of age with high accuracy (instead of 18 to 24 months of age, as is currently recommended).

January 23, 2020 – A study in the journal Cell identifies 102 genes that are associated with an autism risk. Previously, researchers were only aware of 65.

May 10, 2020 – In a report published in the Journal of Autism and Developmental Disorders, the CDC estimates that 2.2% of Americans adults have autism spectrum disorder. The report, which is the first US study of autism in adults, indicates that up to 5.4 million people age 18 and older, or about 1 in 45 people, have an autism spectrum condition.

February 14, 2022 – A meta-analysis published in JAMA Pediatrics finds that early mortality, due to natural or unnatural causes, is more than two times more likely for people with autism spectrum disorder than the general population.

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Vaccines Fast Facts | CNN



CNN
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Here’s a look at information and statistics concerning vaccines in the United States. For vaccines related to coronavirus, see Coronavirus Outbreak Timeline Fast Facts.

The Centers for Disease Control and Prevention (CDC) provides vaccine recommendations by age, as well as by disease.

For more than 100 years, there has been public discord regarding vaccines based on issues like individual rights, religious freedoms, distrust of government and the effects that vaccines may have on the health of children.

Exemptions to vaccines fall into three general categories: medical, religious and philosophical.

As of May 25, 2022, 44 states and the District of Columbia have enacted legislation allowing religious exemptions from vaccines, and 15 states allow philosophical (non-spiritual) exemptions.

1796 – Edward Jenner develops the smallpox vaccine, the world’s first successful vaccine.

1855 – Massachusetts mandates that school children are to be vaccinated (only the smallpox vaccine is available at the time).

February 20, 1905 – In Jacobson v. Massachusetts, the US Supreme Court upholds the State’s right to compel immunizing against smallpox.

November 13, 1922 – The US Supreme Court denies any constitutional violation in Zucht v. King in which Rosalyn Zucht believes that requiring vaccines violates her right to liberty without due process. The High Court opines that city ordinances that require vaccinations for children to attend school are a “discretion required for the protection of the public health.”

1952 – Dr. Jonas Salk and his team develop a vaccine for polio. A nationwide trial leads to the vaccine being declared in 1955 to be safe and effective.

1963 – The first measles vaccine is released. In 2000, the CDC declares the US has achieved measles elimination, defined as “the absence of continuous disease transmission for 12 months or more in a specific geographic area.” While the US has maintained measles elimination since, there are occasional outbreaks.

1986 – Congress passes the National Childhood Vaccine Injury Act. This coordinates vaccine activities across several government agencies to monitor vaccine safety, requires vaccine information statements are provided to those receiving vaccines, and creates the National Vaccine Injury Compensation Program to compensate those injured by vaccines on a “no fault” basis.

March 19, 1992 – Rolling Stone publishes an article by Tom Curtis, “The Origin of AIDS,” which presents a theory that ties HIV/AIDS to polio vaccines. Curtis writes that in the late 1950s, during a vaccination campaign in Africa, at least 325,000 people were immunized with a contaminated polio vaccine. The article alleges that the vaccine may have been contaminated with a monkey virus and is the cause of the human immunodeficiency virus, later known as HIV/AIDS.

August 10, 1993 – Congress passes the Omnibus Budget Reconciliation Act which creates the Vaccines for Children Program, providing qualified children free vaccines.

December 9, 1993 – Rolling Stone publishes an update to the Curtis article, clarifying that his theory was not fact, and Rolling Stone did not mean to suggest there was any scientific proof to support it, and the magazine regrets any damage caused by the article.

1998 – British researcher Andrew Wakefield and 12 other authors publish a paper stating they had evidence that linked the vaccination for Measles, Mumps and Rubella (MMR) to autism. They claim they discovered the measles virus in the digestive systems of autistic children who were given the measles, mumps and rubella (MMR) vaccine. The publication leads to a widespread increase in the number of parents choosing not to vaccinate their children for fear of its link to autism.

2004 – Co-authors of the Wakefield study begin removing their names from the article when they discover Wakefield had been paid by lawyers representing parents who planned to sue vaccine manufacturers.

May 14, 2004 – The Institute of Medicine releases a report “rejecting a causal relationship between the MMR vaccine and autism.”

February 2010 – The Lancet, the British medical journal that published Wakefield’s study, officially retracts the article. Britain also revokes Wakefield’s medical license.

2011 – Investigative reporter Brian Deer writes a series of articles in the BMJ exposing Wakefield’s fraud. The articles state that he used distorted data and falsified medical histories of children that may have led to an unfounded relationship between vaccines and the development of autism.

2011 – The US Public Health Service finds that 63% of parents who refuse and delay vaccines do so for fear their children could have serious side effects.

June 17, 2014 – After analyzing 10 studies, all of which looked at whether there was a link between vaccines and autism and involved a total of over one million children, the University of Sydney publishes a report saying there is no correlation between vaccinations and the development of autism.

February 2015 – Advocacy group Autism Speaks releases a statement, “Over the last two decades, extensive research has asked whether there is any link between childhood vaccinations and autism. The results of this research are clear: Vaccines do not cause autism. We urge that all children be fully vaccinated.

August 23, 2018 – A study published in the American Journal of Public Health finds that Twitter accounts run by automated bots and Russian trolls masqueraded as legitimate users engaging in online vaccine debates. The bots and trolls posted a variety of anti-, pro- and neutral tweets and directly confronted vaccine skeptics, which “legitimize” the vaccine debate, according to the researchers.

October 11, 2018 – Two reports published by the CDC find that vaccine exemption rates and the percentage of unvaccinated children are on the rise.

January 2019 – The World Health Organization names vaccine hesitancy as one of 10 threats to global health in 2019.

September 4, 2019 – Facebook announces that educational pop-up windows will appear on the social media platforms when a user searches for vaccine-related content, visits vaccine-related Facebook groups and pages, or taps a vaccine-related hashtag on Instagram

December 19, 2019 – The US Food and Drug administration announces the approval of a vaccine for the prevention of the Ebola virus for the first time in the United States. The vaccine, Ervebo, was developed by Merck and protects against Ebola virus disease caused by Zaire ebolavirus in people 18 and older.

December 27, 2019 – A study published in the medical journal JAMA Network Open finds that a single dose of the human papillomavirus (HPV) vaccine may be just as effective as two or three doses at preventing cancer-causing HPV infection.

February 3, 2020 – The National Institute of Allergy and Infectious Diseases (NIAID) announces that a clinical trial for an HIV vaccine has been discontinued since the vaccine was not found to prevent infections of human immunodeficiency virus, the virus that causes AIDS.

May 3, 2023 – The US FDA approves, Arexvy, the first vaccine to protect against respiratory syncytial virus or RSV. It is a single shot for adults 60 or older.

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More people with Down syndrome are living longer, but medical systems aren’t keeping up | CNN


Montrose, Missouri
KFF
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It took Samantha Lesmeister’s family four months to find a medical professional who could see that she was struggling with something more than her Down syndrome.

The young woman, known as Sammee, had become unusually sad and lethargic after falling in the shower and hitting her head. She lost her limited ability to speak, stopped laughing, and no longer wanted to leave the house.

General-practice doctors and a neurologist said such mental deterioration was typical for a person with Down syndrome entering adulthood, recalled her mother, Marilyn Lesmeister. They said nothing could be done.

The family didn’t buy it.

Marilyn researched online and learned the University of Kansas Health System has a special medical clinic for adults with Down syndrome. Most other Down syndrome programs nationwide focus on children, even though many people with the condition now live into middle age and often develop health problems typically associated with seniors. And most of the clinics that focus on adults are in urban areas, making access difficult for many rural patients.

The clinic Marilyn found is in Kansas City, Kansas, 80 miles northwest of the family’s cattle farm in central Missouri. She made an appointment for her daughter and drove up.

The program’s leader, nurse practitioner Moya Peterson, carefully examined Sammee Lesmeister and ordered more tests.

“She reassured me that, ‘Mom, you’re right. Something’s wrong with your daughter,’” Marilyn Lesmeister said.

With the help of a second neurologist, Peterson determined Sammee Lesmeister had suffered a traumatic brain injury when she hit her head. Since that diagnosis about nine years ago, she has regained much of her strength and spirit with the help of therapy and steady support.

Sammee, now 27, can again speak a few words, including “hi,” “bye,” and “love you.” She smiles and laughs. She likes to go out into her rural community, where she helps choose meals at restaurants, attends horse-riding sessions at a stable, and folds linens at a nursing home.

Without Peterson’s insight and encouragement, the family likely would have given up on Sammee’s recovery. “She probably would have continued to wither within herself,” her mother said. “I think she would have been a stay-at-home person and a recluse.”

The Lesmeisters wish Peterson’s program wasn’t such a rarity. A directory published by the Global Down Syndrome Foundation lists just 15 medical programs nationwide that are housed outside of children’s hospitals and that accept Down syndrome patients who are 30 or older.

The United States had about three times as many adults with the condition by 2016 as it did in 1970. That’s mainly because children born with it are no longer denied lifesaving care, including surgeries to correct birth defects.

Adults with Down syndrome often develop chronic health problems, such as severe sleep apnea, digestive disorders, thyroid conditions, and obesity. Many develop Alzheimer’s disease in middle age. Researchers suspect this is related to extra copies of genes that cause overproduction of proteins, which build up in the brain.

“Taking care of kids is a whole different ballgame from taking care of adults,” said Peterson, the University of Kansas nurse practitioner.

Sammee Lesmeister is an example of the trend toward longer life spans. If she’d been born two generations ago, she probably would have died in childhood.

She had a hole in a wall of her heart, as do about half of babies with Down syndrome. Surgeons can repair those dangerous defects, but in the past, doctors advised most families to forgo the operations, or said the children didn’t qualify. Many people with Down syndrome also were denied care for serious breathing issues, digestive problems, or other chronic conditions. People with disabilities were often institutionalized. Many were sterilized without their consent.

Such mistreatment eased from the 1960s into the 1980s, as people with disabilities stood up for their rights, medical ethics progressed, and courts declared it illegal to withhold care. “Those landmark rulings sealed the deal: Children with Down syndrome have the right to the same lifesaving treatment that any other child would deserve,” said Brian Skotko, a Harvard University medical geneticist who leads Massachusetts General Hospital’s Down Syndrome Program.

The median life expectancy for a baby born in the U.S. with Down syndrome jumped from about four years in 1950 to 58 years in the 2010s, according to a recent report from Skotko and other researchers. In 1950, fewer than 50,000 Americans were living with Down syndrome. By 2017, that number topped 217,000, including tens of thousands of people in middle age or beyond.

The population is expected to continue growing, the report says. A few thousand pregnant women a year now choose abortions after learning they’re carrying fetuses with Down syndrome. But those reductions are offset by the increasing number of women becoming pregnant in their late 30s or 40s, when they are more likely to give birth to a baby with Down syndrome.

Skotko said the medical system has not kept up with the extraordinary increase in the number of adults with Down syndrome. Many medical students learn about the condition only while training to treat pediatric patients, he said.

Few patients can travel to specialized clinics like Skotko’s program in Boston. To help those who can’t, he founded an online service, Down Syndrome Clinic to You, which helps families and medical practitioners understand the complications and possible treatments.

Charlotte Woodward, who has Down syndrome, is a prominent advocate for improved care. She counts herself among the tens of thousands of adults with the condition who likely would have died years ago without proper treatment. Woodward, 33, of Fairfax, Virginia, had four heart surgeries as a child and then a heart transplant in her 20s.

Woodward, who is an education program associate for the National Down Syndrome Society, has campaigned to end discrimination against people with disabilities who need organ transplants.

She said her primary care doctor is excellent. But she has felt treated like a child by other health care providers, who have spoken to her parents instead of to her during appointments.

She said many general-practice doctors seem to have little knowledge about adults with Down syndrome. “That’s something that should change,” she said. “It shouldn’t just be pediatricians that are aware of these things.”

Woodward said adults with the condition should not be expected to seek care at programs housed in children’s hospitals. She said the country should set up more specialized clinics and finance more research into health problems that affect people with disabilities as they age. “This is really an issue of civil rights,” she said.

Advocates and clinicians say it’s crucial for health care providers to communicate as much as possible with patients who have disabilities. That can lead to long appointments, said Brian Chicoine, a family practice physician who leads the Adult Down Syndrome Center of Advocate Aurora Health in Park Ridge, Illinois, near Chicago.

“It’s very important to us that we include the individuals with Down syndrome in their care,” he said. “If you’re doing that, you have to take your time. You have to explain things. You have to let them process. You have to let them answer. All of that takes more time.”

Time costs money, which Peterson believes is why many hospital systems don’t set up specialized clinics like the ones she and Chicoine run.

Peterson’s methodical approach was evident as she saw new patients on a recent afternoon at her Kansas City clinic. She often spends an hour on each initial appointment, speaking directly to patients and giving them a chance to share their thoughts, even if their vocabularies are limited.

Her patients that day included Christopher Yeo, 44, who lives 100 miles away in the small town of Hartford, Kansas. Yeo had become unable to swallow solid food, and he’d lost 45 pounds over about 1½ years. He complained to his mother, Mandi Nance, that something “tickled” in his chest.

During his exam, he lifted his shirt for Peterson, revealing the scar where he’d had heart surgery as a baby. He grimaced, pointed to his chest, and repeatedly said the word “gas.”

Peterson looked Yeo in the eye as she asked him and his mother about his discomfort.

The nurse practitioner takes seriously any such complaints from her patients. “If they say it hurts, I listen,” she said. “They’re not going to tell you about it until it hurts bad.”

Nurse practitioner Moya Peterson speaks to Christopher Yeo of Hartford, Kansas. Peterson leads an rare clinic for adults with Down syndrome.

Yeo’s mother had taken him to a cardiologist and other specialists, but none had determined what was wrong.

Peterson asked numerous questions. When does Yeo’s discomfort seem to crop up? Could it be related to what he eats? How is his sleep? What are his stools like?

After his appointment, Peterson referred Yeo to a cardiologist who specializes in adults with congenital heart problems. She ordered a swallowing test, in which Yeo would drink a special liquid that appears on scans as it goes down. And she recommended a test for Celiac disease, an autoimmune disorder that interferes with digestion and is common in people with Down syndrome. No one had previously told Nance about the risk.

Nance, who is a registered nurse, said afterward that she has no idea what the future holds for their family. But she was struck by the patience and attention Peterson and other clinic staff members gave to her son. Such treatment is rare, she said. “I feel like it’s a godsend. I do,” she said. “I feel like it’s an answered prayer.”

Peterson serves as the primary care provider for some of her patients with Down syndrome. But for many others, especially those who live far away, she is someone to consult when complications arise. That’s how the Lesmeisters use her clinic.

Mom Marilyn is optimistic Sammee can live a fulfilling life in their community for years to come. “Some people have said I need to put her in a home. And I’m like, ‘What do you mean?’ And they say, ‘You know ― a home,’” she said. “I’m like, ‘She’s in a home. Our home.’”

Sammee’s sister, who lives in Texas, has agreed to take her in when their parents become too old to care for her.

Marilyn’s voice cracked with emotion as she expressed her gratitude for the help they have received and her hopes for Sammee’s future.

“I just want her to be taken care of and loved like I love her,” she said. “I want her to be taken care of like a person, and not a condition.”

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What is autism? An expert explains | CNN



CNN
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Some individuals with autism have challenges processing senses. Others struggle to communicate. Still others might have a tough time socializing, thinking, physically moving or just going about daily living.

People with autism have their own ways of interacting with the world, because autism is a developmental disability that affects everyone who has it a little differently, according to Dr. Daniel Geschwind, the Gordon and Virginia Macdonald distinguished professor of human genetics, neurology and psychiatry at UCLA.

Geschwind has spent 25 years studying autism and what causes it. To mark Autism Awareness Month, CNN talked with him about what autism is and what causes it.

This conversation has been lightly edited and condensed for clarity.

CNN: What is autism?

Dr. Daniel Geschwind: Autism refers to a broad range of conditions characterized by challenges with social skills and social and communication and repetitive behaviors, resistance to changes in routine, or restricted interests. I prefer to call it “the Autisms,” because it’s not one thing, and no two autistic children or adults are exactly alike even though they may share basic features. People with autism may also have some sensory-motor integration issues, especially sensory hypersensitivity.

CNN: How prevalent is autism today?

Geschwind: It isn’t rare. The most recent statistics (from the US Centers for Disease Control and Prevention) came out in March, pulled data from 11 sites (in the United States) and reported 1 out of every 36 kids is autistic. The study before that estimated around 1 in 40. About 10 years ago, the autism rate was 1 in 100, or even lower.

It would be easy to look at this trend and say autism is increasing, but that’s not really what is happening. The most recent data reflects that our ability to recognize autism and diagnose it early has improved dramatically. We’re now able to diagnose people with autism who might have (previously) fallen through the cracks.

Everybody is neurodivergent to some extent. For example, if you look at a simple IQ test, a substantial portion of people will perform really badly on one specific item. That doesn’t mean they have problems — it’s just that it means we all have strengths and weaknesses.

If I were being tested on artistic ability, for example, or engineering ability, I would be far below what’s called typical. I think we have to accept that intelligence is not just one thing, that cognition isn’t one thing, that there’s not just one way to behave.

CNN: What does it mean when people describe some as being “on the spectrum”?

Geschwind: About a decade ago, the term “autism spectrum disorder” was adopted to encompass everything that we called autism into one rubric. The intent was simply to describe the variability in how people with autism act and behave biomedically. There are some autistic individuals who just need accommodations and don’t need treatment. There are other autistic individuals who need a lot of treatment. The spectrum was intended to include them all.

Over time, non-autistic people began referring to the spectrum in a linear fashion: high to low. That means some autistic individuals were categorized as “high-functioning,” while others were categorized as “low-functioning.” For many, the notion of a spectrum is now a loaded term. Many believe that instead of talking about autism in a linear fashion, we should talk about it as a wheel or pie, where each slice represents a different trait and every individual has different strengths and weaknesses.

CNN: Is there a cure for autism?

Geschwind: There is no cure. At the same time, we’ve come very far in understanding what autism is, and we’re making progress on how to treat it. When I started researching autism 25 years ago, the autism rate was 1 in 1,000 or 1 in 2,000. To put it in deeper historical perspective, I think at that time there was only about $10 million a year or less in autism research being done that was funded (by the National Institutes of Health). And so, there was a huge disconnect between the research dollars, public awareness and the real needs of patients and families.

The notion of the term “curing” autism can be controversial. From my perspective, our true goal is to establish a kind of personalized medicine, or precision health in autism and other neuropsychiatric disorders, so that each autistic person is seen as the individual they are. We envision a world where individuals who are severely impacted by autism have the opportunity to get therapy and drugs that can help them — and those for whom a therapy is not warranted or who don’t want it will have opportunities to live life the way they want to as well. Patient autonomy and societal accommodation are important aspects when considering these issues.

CNN: What causes autism?

Geschwind: Almost every medical condition has both genetic and environmental components. In autism, it seems that heritability is very high. The most recent large study suggested that heritable genetic factors — the things that you get from your parents that your parents have in their DNA — are probably somewhere around 80% or slightly higher.

That leaves 20% that’s nonheritable, and of that we know that at least 10% of autism is caused by rare mutations that are not inherited. And that sounds like a paradox, but it’s not. If you think about Down syndrome, that’s a genetic mutation that the parents don’t have in their DNA. That’s called a new, or de novo, mutation.

You can calculate a risk score for having autism based on genetics, (but) right now, the risk score for autism is not that predictive because we haven’t done enough research. For other conditions like cardiovascular or certain cancers, risk scores are very predictive because very large numbers of people have been studied.

Even so, this autism risk score is strongly correlated with high educational attainment, or a high IQ, which again speaks to the strengths associated with being autistic and highlights that we need to be more aware of the strengths that autistic individuals may have as well to optimize their opportunities to achieve their goals or contribute to society.

There also are several environmental factors that have been shown to increase the risk of autism. One of them is maternal exposure to valproate, which is an anti-epilepsy medication. There are several maternal viral infections that have been associated with autism. And two other things: the interbirth interval — how quickly after one birth a mother has another — and the age of the father. The thought on the last point is that as a man ages, their DNA repair mechanisms are maybe less active, and there are more frequent mutations in sperm.

A key point is that all these known environmental factors act prenatally, so in most cases the tendency towards being on the spectrum is something that individuals are born with.

CNN: To what extent has research debunked the controversial notion that vaccines can cause autism?

Geschwind: The notion that vaccines cause autism has been entirely (disproved). There have been dozens of studies, using very different methodologies. There is absolutely no evidence that vaccines cause autism, and there’s been much more harm than good done by purveyors of that fiction.

CNN: How do you treat autism?

Geschwind: It is imperative to have an early diagnosis, because we know that early identification and early intervention with behavioral therapies can be effective in up to 50% of kids. Some kids will respond so well that it’s very hard to make a diagnosis of autism when they’re 9 years old if the therapy is started early enough.

The problem is that for many autistic individuals, current therapies are not that effective. There’s a lot of work being done developing more effective cognitive behavioral therapies, figuring out which therapy is the best for which child. There’s also work being done to develop medications that can be helpful to treat certain symptoms such as injurious behavior, repetitive behavior or difficulty with changes in routines.

My colleagues and I want to use treatment to augment and improve people’s symptoms, not change who they are fundamentally. We believe strongly in every individual’s autonomy. We also believe in personalized medicine so that it’s not one-size-fits-all. There will be some patients in whom we’re trying to correct a severe genetic mutation that has profound consequences, and there’ll be others that need only a handful of accommodations, just like we provide for folks who need wheelchairs.

CNN: What will your research focus on next?

Geschwind: There are two basic frontiers in my research. One recognizes that most of the work in neuropsychiatric disorders and autism has been done in primarily White European populations and focuses on a pressing need to be studying diverse populations. About seven or eight years ago, I started working with African American communities because certain aspects of genetics are population-specific, and we as researchers really need to understand that.

The frontier that is crosscutting across all of this is we need to be able to move from genetics in a population to genetics in an individual, so that by looking at somebody’s genetic makeup, we can understand the mechanism of their autism. This is precision medicine.

My work is trying to understand how specific genetic variants, how specific mutations, impact brain development to eventually lead to the symptoms of autism. If my colleagues and I can understand that mechanism, just like we can understand the genetic mechanism in cancer, we can find a drug to target that and improve those symptoms over time.

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