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The CDC is reporting the highest rate of emergency room visits from tick bites since 2017 in many parts of the U.S.

Early reports indicate there may be another case, but spread is thought to be localized.

Cyclosporiasis has sickened dozens in Michigan and other parts of the U.S. Here's what to know about the parasitic infection being tracked by the CDC.

Vibrio vulnificus, a deadly bacterium, is spreading in US waters as federal disease surveillance is reduced. Warming seas contribute to its spread, raising public health concerns.

A 2020 mask mandate study used by the CDC to inform masking policy is scrutinized for flawed methodology and cherry-picked data on COVID-19.

West Nile virus season is off to its earliest and worst start since 2004 ...

A high-tech bait bike program in Oregon has led to dozens of arrests as deputies crack down on bicycle theft in Washington County, near Portland.

A parasite that causes explosive diarrhea has spread across multiple US states, with health officials investigating an outbreak that's hospitalized dozens.