Plus, why Trump's turnaround on vaccine safety was very late—but still helpful.
While anti-vaccine propaganda continues to spread online, experts and teens are talking about how to fight it.
The state would be the fourth to ban non-medical vaccine exemptions, a policy change lauded as one of the surest ways to avoid an outbreak.
New reports have implicated Facebook and other social media platforms for their role in the spread of anti-vaccine propaganda.
What do you do when your parents refuse to let you get vaccinated? Ask the Internet.
The WHO has named vaccine hesitancy as one of the top 10 public-health threats of 2019. Here's how the anti-vaccination movement came about, and what to do about it.