People with COVID-19 can infect others even if they are more than 6 feet apart. In updated guidance, the CDC acknowledges airborne transmission can occur, especially in poorly ventilated spaces.

Do portable air cleaning machines really help reduce the risk of COVID-19 transmission in the home? The frustrating short answer: "It depends." Find out what it depends upon.

Scientists say it's increasingly clear that airborne virus particles help the coronavirus superspread. Here's what they recommend to reduce the risks.