Whenever vaccine uptake falls to a level below that needed to maintain herd immunity, the risk of outbreaks of vaccine-preventable diseases climbs. It doesn’t take that dramatic of a decline. Here’s a study that shows how a small decrease in vaccine uptake can lead to a large increase in disease.
Back in the day, I used to write posts with titles like When the outbreaks occur, they’ll start in California. I even wrote a followup, When the outbreaks occur, they’ll start in California, 2014 edition. The reason, of course, was that California was one of the epicenters of vaccine hesitancy as well as the home […]