Herd immunity is the name for a point in time when it's hard for a disease to spread through a group of people. The idea of herd immunity works for some diseases, such as measles. But it's a harder ...

You might have heard of herd or community immunity, when a vaccinated portion of a population (aka "the herd") provides unvaccinated people with some protection from a contagious disease. Thanks to ...

Anti-vaxxers could prevent herd immunity A big reason we might never reach herd immunity is because not enough people are willing to get vaccinated. If that happens, the virus will have ample ...

If you think herd immunity is the finish line to this pandemic, it's time for a reality check. Herd immunity with Covid-19 could come and go, scientists say. Or we might never reach it at all. Other ...