Doctors worry as anti-vaccination messages escalate from social media misinformation to personal threats - CBC News:

As anti-vaccination groups fight back against public health campaigns to promote immunization in the face of measles outbreaks, some Canadian doctors say the battle has escalated beyond social media platforms to personal threats and attacks.
https://www.cbc.ca/news/health/anti-vaccination-threats-against-canadian-doctors-1.5115955