Measles, mumps and misinformation: how Crunchy Moms became ‘the most dangerous’ group on Facebook

Meta says it removes content that could cause imminent physical harm - but nearly half a million members have joined a group that regularly promotes misinformation

As a measles outbreak spread through Lancaster county, Pennsylvania, in August, a parent turned to a massive public Facebook group, Crunchy Moms, for advice. They were considering getting their three-year-old vaccinated, in part to protect their six-month-old.

I'm nervous for my baby," the parent wrote.