Experts, doctors and the public alike have long been skeptical of the health benefits of vaccines, which are used in more than 30 countries around the world.
Some vaccines, including the MMR vaccine, are known to cause autism.
They also are the cause of many childhood cancers, including leukemia.
Experts say the vaccine may cause other serious health problems, including more serious infections, and even death.
CNN sought answers from several experts and vaccine experts to find out how much of a link there is between vaccines and autism.
Here are their answers: Dr. David Gorski, associate professor of medicine at the University of Florida School of Medicine, who was one of the first scientists to question the safety of vaccines as an immunization, says there is no evidence linking vaccines to autism.
Gorski says there’s no solid evidence that vaccines cause autism, but “you can’t rule it out.”
Gorski is a senior author of a new review of the literature that concludes vaccines do not cause autism in humans.
Dr. Robert Cantu, chief of infectious diseases at the Cleveland Clinic and former director of the National Institutes of Health, says “there is no compelling evidence that MMR is a cause of autism” and “there’s no reason to believe that vaccines would be the culprit.”
Cantu has written a book, “The Big Pharma Gamble: The Untold Story of the Coronavirus Pandemic and How We Got Here,” which chronicles how the industry’s vaccine makers hid information about the potential dangers of vaccines and manipulated research.
Cantu says that the MMR and other vaccines have been shown to reduce the risk of autism by up to 40% in children and adults.
He also says there has been a rise in autism, even among children who have never been vaccinated.
Richard Schatz and Paul Offit, who co-wrote the New England Journal of Medicine paper that showed a link between MMR and autism, say it’s not possible to definitively prove a cause-and-effect relationship.
They say they believe the increased risk of ASD is due to the increased use of vaccines.
They wrote that vaccines are a “major contributor” to autism, which can also lead to learning disabilities, and that the increase in autism is linked to increased rates of immunization in children.
Vaccine skeptics disagree.
Michael Siegel, who studies the safety and effectiveness of vaccines at the Johns Hopkins Bloomberg School of Public Health, said there is “no evidence that the vaccines cause Autism or other neurological disorders.”
He says the vaccine is not the cause, but the risk factor.
Vaccines can have side effects and they can be harmful, so we need to be cautious about what we’re getting,” he said.
The Centers for Disease Control and Prevention said in 2016 that the average annual incidence of autism in children ages 2 to 6 has risen from 12 cases in 2007 to about 50 cases in 2016.
According to the Centers for Diseases Control and Control, there are over 11,500 reported cases of autism each year in the United States.
The CDC says about 50% of those cases are linked to vaccines, and in the case of MMR, about half of those are linked with vaccines.
In the U.S., there have been more than 4,000 deaths related to autism between 1999 and 2016, and more than 1,100 in the past year.