Colorado faces its worst measles outbreak in decades, with seven cases linked to Broomfield schools, reflecting vaccination challenges.

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 ...

Opinion: Calls to roll back childhood vaccine mandates are a dangerous gamble with public health, writes A.J. Russo.

A Trump administration lawyer said health secretary Robert F. Kennedy has “broad, unreviewable authority” to alter vaccine policy and could, hypothetically, recommend people get measles to achieve ...

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, ...

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? ...

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 ...

With COVID-19 infection rates beginning to return to pre-omicron levels, is the U.S. any closer to reaching herd immunity? Probably not. Experts say it's not likely that the highly transmissible ...

Herd immunity with Covid-19 could come and go, scientists say. Or we might never reach it at all. "There's a lot of things that have to go our way to actually get to herd immunity," said Dr.

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 ...