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Herd immunity is the name for a point in time when it's hard for a disease to spread through a group of people. The idea of herd immunity works for some diseases, such as measles. But it's a harder ...

Remember herd immunity, the early aspirational goal of our COVID strategy? It has arrived, at least according to some recent findings of the CDC’s Morbidity and Mortality Weekly Reports (MMWR). The ...

As measles outbreaks spread rapidly through parts of North America, a top US immunologist has issued a grave warning: the world may now be entering a “post-herd-immunity” era — a phase in which the ...

A nationwide analysis conducted by NBC News’ Health and Medical Unit, in collaboration with Stanford University researchers, reveals a troubling trend: since 2019, 77% of counties and jurisdictions ...

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 ...

Dayton Daily News survey: Why people are getting the vaccine (or not) What hope looks like: ‘There’s nothing like the hug of a child’ Staff Writer Millions of Ohioans have received vaccines and all ...

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 ...

After nearly three years of keeping COVID under control, China is experiencing a massive new wave of COVID infections. The official figures reporting 60,000 deaths between December 8 and January 12 ...

DeLisa New Williams remembers when measles spread like wildfire through her elementary school. One day, a kid was out sick. Then suddenly everyone was infected, including her. “It knocked out the ...