The backlash against the anti-vaccine movement isn’t just happening at the state level. It’s also happening on social media, as platforms are making changes to stop the spread of misinformation related to vaccination. YouTube has said that anti-vaccine videos violate its policies against harmful acts and is now pulling anti-vaccination material, while Pinterest has blocked searches on the topic of vaccination so as to prevent the spread of misleading information. Meanwhile, Facebook is weighing whether or not to pull anti-vaccination content from its recommendations.

Members of anti-vaccine groups say that parents should have the right to make their own decisions without being denied a school education for their children. Barbara Loe Fisher, head of the National Vaccine Information Center, says, “You cannot bring down the hammer on people and force them to obey one-size-fits-all when the risk is not being shared equally.” Fisher says her group considers this a “parental rights, a human rights issue”

Fisher is right: This is absolutely both a parental rights and a human rights issue. Parents should have the right to decide whatever they think is best for their children. But that doesn’t mean those decisions are free of consequences—especially when they pose a risk to other children. This is not just about individual choice. Measles outbreaks are a public health issue. And these parents are endangering not only the lives of their children, but also the lives of other children who should have the right not to be forced into contact with people who insist on not preventing a very preventable disease. These outbreaks also impact people with compromised immune systems. And when immunization rates fall below a certain level, it raises cause for concern. This is the very reason that mandatory vaccination programs exist in the first place. It is through the enforcement of mandatory vaccination programs that measles was eliminated back in 2000.

We can’t let anti-vaxxers turn this into an individual rights/Big Brother/too much government interference issue. This is deadly serious. There are reasons that science, technology, and modern medicine exist. And while there is a conversation to be had about an overreliance on those things, facts are facts. It is vaccines that help us contain the spread of infectious diseases like measles. There is almost no reason, short of certain existing medical conditions or risks, not to immunize one’s children. And if a parent chooses not to for their own personal reasons, it is reasonable to say that they should not be allowed to send their potentially sick and contagious kids to school where they can infect others. But in an era in which alternative facts (otherwise known as lies) and willful ignorance reign, it’s not surprising that anti-vaccine advocates are raising their voices louder than ever.