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 ...

The concept of herd immunity is one of several factors determining when society might come close to returning to normal. Here's a deeper look at how it works.

Vaccines train the body's defenses to fight infections safely. Learn how vaccines work, how the immune system responds, and ...

As more and more of the United States population gets vaccinated against COVID-19, many are wondering: when will enough people be vaccinated for life to return to normal? That question doesn't have a ...

Herd immunity went from a phrase most of us had never heard of to the thing we're all waiting for in just about a year's time. "It's kind of shorthand for back to normal," said Dr. Bob Wachter, chair ...

SAN FRANCISCO (KGO) -- 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? RELATED ...

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