globalnews.ca
85%
176
Herd immunity: How it works and why it’s a lofty goal for COVID-19
COVID-19, but it also isn’t required to get back to a more normal life, experts say.This has to do with some unique features of the virus, and also, with math.Herd immunity is when enough people have protection against a disease — through either being vaccinated, or by catching it, recovering, and developing antibodies.When a given population has herd immunity, even if the disease gets reintroduced, it won’t lead to outbreaks because most people are protected.This also has the bonus of protecting people in the community who have compromised immune systems who might not be able to protect themselves, according to Dr.