Community immunity, often referred to as herd immunity, refers to a situation in which enough of a population is immune to an infectious disease, either through vaccination or prior infection, to largely stop transmission of the disease and indirectly protect those who aren’t immune. The more contagious the disease, the higher proportion of people need to have immunity to get community immunity.
This classical definition applies to diseases such as measles,
Misconception: Immunity
A Guide to Moderna’s COVID-19 Vaccine
Moderna’s mRNA vaccine is the second COVID-19 vaccine to be authorized and fully approved for use in the U.S. Here, we give a rundown of basic facts about the vaccine and an overview of how it works.
Q&A on COVID-19 Vaccines
Three COVID-19 vaccines are now authorized in the U.S. In this story, we answer some common questions about the shots.
A Guide to Pfizer/BioNTech’s COVID-19 Vaccine
A primer on the first COVID-19 vaccine to receive authorization and approval in the U.S.
Paul Misleads on Natural Infection and COVID-19 Vaccines
In a tweet, Sen. Rand Paul misleadingly suggested that immunity from “[n]aturally acquired” COVID-19 was better than that from a vaccine. But it’s not known how immunity from the two sources compares — and the entire point of a vaccine is to offer immunity without the risk of getting sick.