The first known case challenges the notion that the pandemic erupted suddenly. Instead, several peer-reviewed studies indicate that SARS-CoV-2 may have been circulating at low levels before December ...

The spike isn’t unique to Ventura County. Positive tests have risen across the state. At least 65 bats with rabies have been found in Los Angeles County, the second highest tally in the county’s ...

Pediatrician Dr. Paul Offit joins WIRED to answer the internet's questions about vaccines. How are new vaccines developed?

The protein, reverse transcriptase, has become an essential tool for making DNA copies of RNA.

San Diego is still chasing its first World Series title after 54 years. The juggernaut in Los Angeles is the next obstacle in their way. Leonard Glenn Francis had clipped off his ankle monitor earlier ...