SAN FRANCISCO -- It's a story that has been making headlines across the United States: Did Californians develop herd immunity after possibly being exposed to novel coronavirus last year? On Thursday, ...

Herd immunity occurs when enough people become immune to a disease, either through vaccination or previous infection. This can reduce the likelihood of it spreading and increase protection for ...

A nearly COVID-free summer has long been the goal of public health officials who are striving to get enough people vaccinated by then to achieve so-called herd immunity. But is that a realistic goal? ...

RALEIGH, N.C. (WTVD) -- Dr. Betsey Tilson serves as the State Health Director and the Chief Medical Officer for the Department of Health and Human Services. On Wednesday, she joined ABC11 to discuss ...

LOUISVILLE, Ky. — As vaccinations slow down across the country, many experts worry the nation will not reach herd immunity. That’s where enough people are immune to a disease to make its spread ...

As a number of western nations, including the United States, wind down stay at home orders, the World Health Organization said on Monday that attempting herd immunity without a vaccine is a “dangerous ...

NEW YORK -- More than 90% of U.S. adults remain susceptible to COVID-19, according to research published on Friday. Using data from dialysis centers in the United States, the study, published in The ...

A former State Department official said Tuesday that “herd immunity” has been key to stopping the spread of the coronavirus in China to such a degree the country was able to allow a weekend pool party ...

Changes to federal vaccine recommendations have sparked doubts among parents already unsure about vaccines. The result is a ...