PolitiFact @PolitiFact
Herd immunity occurs when enough people are immune to an infectious disease — through vaccination and/or prior illness — to make its spread from person to person unlikely. It does not require 100% of the population to be vaccinated, as a post suggests. https://t.co/KzDXbdLTGw https://t.co/JMTfyOoyMo — PolitiTweet.org