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Anti-vaxxers trolled a doctors’ office. Here’s what scientists learned from the attack.
The Washington Post

Just before school started in the summer of 2017, Kids Plus Pediatrics of Pittsburgh posted a video on its Facebook page urging parents to vaccinate their children against human papillomavirus, or HPV, which can cause a variety of cancers. Three weeks later, communications director Chad Hermann noticed “something new happening” online.

First, someone posted the claim that “the vaccine kills.” Within minutes, more anti-vaccine comments came pouring in. The next day, someone inside a closed Facebook group started sending private messages with “screen shots so we could see them coordinating the attacks,” Hermann recalled.

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