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New York state has half the population of California but has experienced 14 times as many deaths from novel coronavirus. RELATED: Californians may have developed some herd immunity to coronavirus last ...

Herd immunity occurs when enough people in a group are immune to a specific infection that it cannot spread easily from person to person. Vaccination programs have been successful in creating herd ...

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 ...

An infectious disease specialist took the time to explain what herd immunity is, how it works and when it might affect the spread of COVID-19. Dr. Frank Esper works for the Cleveland Clinic Children's ...

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 ...

So many Americans have gotten COVID-19 that their immunity may have helped slow the virus' spread in key hotspots. A lion's share of the infections and deaths during the US's second coronavirus surge ...