Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

Rapid antimicrobial susceptibility testing for gram-negative blood infections shows no improvement in clinical outcomes ...

Add Yahoo as a preferred source to see more of our stories on Google. (Photo: golero via Getty Images) For many of us, the 2021 holiday season hasn’t gone quite like we’d hoped on the COVID front. Yes ...

With end-of-year holidays quickly approaching, how do we stay safe in gatherings where some people may not be vaccinated? Testing before get-togethers can help, experts say. “Ideally, we would ...

How much should you trust the results of a rapid antigen test? That's a question many people are asking these days amid recent research and anecdotes suggesting these tests may be less sensitive to ...