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SAN FRANCISCO -- Moderna announced people may need a second booster to increase protection. But is a fourth shot the right approach? ABC7 News reporter Luz Pena from San Francisco spoke to multiple ...

As of this month, there have been 1,088 confirmed cases of measles this year in the U.S., according to the latest data from the Centers for Disease Control and Prevention. The majority can be traced ...

Vaccines are one of, if not the, most important developments in public health history, and despite nearly a century of data, ...

Back in 2022, everyone was surprised (and a little uneasy) when the news was announced that a man in New York had contracted poliovirus (polio, for short). After all, don't all children receive the ...