A Shot Of Truth: Why Combating Measles Misinformation Protects Us All

In an era when a viral post can travel faster than any pathogen, misinformation has become one of the most dangerous threats to public health. Measles — a disease once declared eliminated in the United States in 2000 — is rapidly reappearing not because we lack the tools to stop it, but because too many people are being misled about one of the safest and most effective vaccines ever developed.

Public health has always rested on a simple truth: community health elevates individual health. It strives to keep our communities safe for everyone. And for over 50 years, prevention of unnecessary sickness, disability and even early death has been achieved through vaccine campaigns.

Measles is not a harmless childhood illness. It is one of the most contagious viruses on the planet — and even in its “mild” form it is, as the National Foundation for Infectious Diseases describes, a miserable disease marked by high fever, light sensitivity, dehydration, relentless cough, pneumonia and a full-body rash. In severe cases, the consequences are far worse: seizures, deafness, blindness, permanent lung damage and devastating immune amnesia that can erase the body’s ability to fight other infections. Measles can kill — not only in the moment, but years after the initial infection.

The arrival of measles vaccine in 1963 was nothing short of a scientific triumph. In the decade before it became available, nearly every child in the United States had contracted measles by age 15. Each year, an estimated 3 to 4 million people were infected; 48,000 were hospitalized, 1,000 developed brain-swelling and 400 to 500 — most of them children — died. Widespread vaccination changed the trajectory of America’s battle with the virus with breathtaking speed. It was regarded as a significant public health success story. By 1981, reported measles cases had dropped by 80 percent in a single year, transforming a once-inevitable childhood disease into a “preventable” one.

That progress is now at risk — not because science has changed, but because the health information landscape has.

In more than a decade as a community health researcher, I have learned to follow the evidence and the evidence tells a very different story about the measles vaccine than the one circulating online.

Truth About The Measles Vaccine

The current measles, mumps, and rubella (MMR) vaccine is among the most closely studied medical interventions in history. Its safety has been evaluated across decades, countries and populations, and the conclusion has remained consistent: it works and it is overwhelmingly safe. Like most vaccines, it can cause mild and temporary side effects — soreness at the injection site, a low-grade fever or a brief rash. Serious adverse reactions are extraordinarily rare. The lifesaving benefits of the MMR vaccine far outweigh the risks of these recognized side effects.

What was once a different and feared childhood illness became a relatively rare disease prevented within a single generation — not by accident, but through scientific rigor, sustained public health investment, and the collective participation of families, friends and communities at large who chose to protect, not only their own children, but their communities.

A Simple Way To Challenge Misinformation

In today’s overwhelming health information environment, following the evidence requires more than good intentions; it requires good tools. One of the most practical is the CRAAP test, developed by librarian Sarah Blakeslee at California State University, Chico, which offers a quick way to evaluate the credibility of what we see and share.

• Is the information current — or is it recirculating claims long since disproven?
• Is it relevant to the question at hand?
• Does it come from a credible authority with recognized expertise?
• Is it accurate, supported by data and corroborated by other reliable sources?
• And what is its purpose — to inform, or to provoke fear and clicks?

These are not academic questions. They are everyday tools. Because every time we pause to evaluate before we share, we interrupt the spread of misinformation in the same way a vaccine interrupts the spread of a virus.

We do not need a new scientific breakthrough to stop measles. We need to rebuild trust in resources like our local and state public health departments and agencies, schools of public health and national and global agencies like the World Health Organization and the Centers for Disease Control. Measles does not spread because vaccines fail; it spreads when confidence in them does. The solution is not only a shot in the arm. It is a commitment to truth, to community and to the understanding that my health depends on yours, and yours on mine.