One in three kindergarteners in Allegheny County were in a classroom with vaccination rates below the herd immunity threshold ...

It's a laudable goal to aim for herd immunity, but there are some sensitive conversations to be had for the U.S. to get there ...

As scientists learn more about the virus, they say herd immunity won't work. Early in the pandemic, scientists and public health experts leaned on their experience with other viruses to make ...

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The ongoing measles outbreak has reached three states and serves as a stark reminder of the vital role that herd immunity plays in safeguarding our communities. Originating in Gaines County, Texas, ...

SYRACUSE, N.Y. — As vaccine supply steadily increases, Onondaga County leaders are calling for expanded eligibility, with many appointments still at grabs. The Onondaga County Commissioner of Health, ...

California provided school-level MMR vaccination data for kindergartners. Map: Jacque Schrag/Axios San Diego County's measles ...

Colorado measles vaccination rates are falling behind other states, leading to a lower herd immunity among children.