Do Vaccines Cause Autism? (And 5 Other Vaccine Myths Debunked)

Vaccines are one of the most important medical advances in human history, yet misinformation continues to create fear and doubt. One of the most persistent myths is the belief that vaccines cause autism. In this article, we'll answer that question directly and also explore five other common vaccine myths, using research-backed facts to help you make informed decisions about your health.

Do Vaccines Cause Autism?

No—vaccines do not cause autism. This myth began with a now-discredited study published in 1998, which falsely linked the MMR (measles, mumps, rubella) vaccine to autism. The study was later retracted, and numerous large-scale studies since then have found no connection between vaccines and autism.

The Centers for Disease Control and Prevention (CDC), World Health Organization (WHO), and American Academy of Pediatrics all agree: vaccines are safe and do not cause autism.

Key Takeaway: Autism is a complex developmental condition with multiple contributing factors—but vaccines are not one of them.

Myth #1: Vaccines Are Dangerous

Vaccines undergo rigorous testing for safety before they are approved, and they continue to be monitored once they’re in use. Most vaccine side effects are mild and temporary, such as soreness at the injection site or a low-grade fever. Serious side effects are extremely rare, occurring in less than 1 in a million cases.

Fact: The risk of serious complications from vaccine-preventable diseases is far greater than the risk of vaccination.

Myth #2: You Don’t Need Vaccines If You’re Healthy

Being healthy doesn’t make you immune to infectious diseases. Many viruses and bacteria are highly contagious and can affect even the healthiest individuals. Vaccines help prevent the spread of disease and protect those who are more vulnerable, including babies, the elderly, and those with weakened immune systems.

Fact: Vaccines protect you and the people around you.

Myth #3: Natural Immunity Is Better Than Vaccine Immunity

While natural immunity from infection can provide protection, it often comes at a high cost: severe illness, hospitalization, or even death. Vaccines provide immunity without making you suffer through the disease.

Fact: Vaccine-acquired immunity is safer and still highly effective.

Myth #4: Vaccines Overload the Immune System

The idea that children receive "too many vaccines" is not supported by science. From the moment they're born, babies are exposed to countless microbes every day. The amount of antigens in vaccines is tiny compared to what a child encounters in daily life.

Fact: The immune system can handle multiple vaccines at once without issue.

Myth #5: Vaccinated People Still Get Sick, So What’s the Point?

Vaccines are not 100% effective, but they significantly reduce the risk of getting sick and drastically lower the chances of severe illness, hospitalization, and death. Think of vaccines like seatbelts: they won’t prevent every accident, but they greatly reduce harm.

Fact: Vaccinated people may still catch infections, but symptoms are usually milder and complications are less likely.

Final Thoughts

When it comes to protecting your health and your community, vaccines are one of the most effective tools available. While it’s normal to have questions, it’s important to rely on evidence-based sources and speak with your healthcare provider.

Vaccines don’t cause autism. They don’t overwhelm the immune system. And they do save lives.

Talk to your doctor. Stay informed. Protect your community.

Book a pediatric or primary care visit to make sure you are up-to-date on your immunizations today!