Quaternary ammonium compounds, also known as QACs or quats, are commonly used antimicrobials also found in many household products. Soap and water may be a safer bet when cleaning surfaces.

Recent research suggests rats may not have played the critical role in keeping plague going in Europe.

A lot of federal money is now available for making school buildings healthier. Two environmental health experts explain how school districts can best use it.

After a nose swab tests positive for a virus or bacteria, scientists can use the sample’s genetic sequence to figure out where and when the pathogen emerged and how fast it’s changing.

The COVID-19 vaccines are a smash success. But that doesn't mean they keep every vaccinated person completely free of the coronavirus.

Winter weather forces us to congregate inside but evidence suggests cold, dry air also helps spread respiratory viruses.

It's hard to eat while wearing a face mask, and social distancing isn't easy in restaurants' normally tight quarters. An infectious disease expert offers some tips on what to look for to stay safe.

It's hard to eat while wearing a face mask, and social distancing isn't easy in restaurants' normally tight quarters. An infectious disease expert offers some tips on what to look for to stay safe.

The U.S. is slowly reopening, but the messages from governments are confusing. An expert offers guidance on many people's first priority -- connecting with loved ones.