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 ...

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Herd immunity is a significant epidemiologic phenomenon that becomes effective when a large majority of people in a population are vaccinated against an infectious disease and hence restrict its ...

If you haven't had your shot at a shot yet, you're probably getting much closer to that point—on May 1, states will open the COVID vaccines to the general adult population, and already, more than 143 ...

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 ...

To stop the spread of an infectious disease like measles, you don’t have to vaccinate everyone. But you do have to vaccinate many. Just how many? To let you discover for yourself, we simulated an ...

Coronavirus vaccination is seen taking place in Minato Ward, Tokyo, on June 21, 2021. (Mainichi/Koichiro Tezuka) TOKYO -- Over 60% of people in Japan have had two COVID-19 vaccine shots, and new ...

The initial epicenter within a Texas Mennonite community highlights how declining vaccination rates can lead to rapid disease transmission. While some may believe that abstaining from vaccination ...

The danger of trying to achieve herd immunity through infection is that many people will die or be forced to live with post-recovery disabilities. This is exactly what I have repeatedly tried to get ...

To the editor: The new leaders at the U.S. Food and Drug Administration and Department of Health and Human Services say COVID-19 vaccines will require additional testing before being approved for ...