The advisory was released amid a growing debate over cellphone usage and its impact on youth.
The nation's top infectious disease expert called on Americans to keep up their protections against the coronavirus.
While it did not specifically involve COVID-19 or any other virus, the study used a laser light to examine the number of small respiratory droplets produced from human speech.
Testing people may not be the best way to see how much coronavirus is in a community. Testing sewers may be better.
Scotland has approved the first stage of the country's plan to make tampons and pads available for free, which they say can help end "period poverty."
Dagmar Turner played the violin while doctors removed a tumor from her brain, making sure surgery didn't impact her musical ability.