A dust storm captured by NASA on Feb. 7, 2018. (NASA's Earth Observatory) At a Glance The viruses are frequently picked up by sea spray and fall back to earth via dust storms and rain.The research team is the first to quantify the number of viruses traveling through the troposphere.A single cubic meter of air containshundreds of millions of viruses and tens of millions of bacteria, the researchers found. We may not be able to see them, but billions of...

The CDC warns about a new strain of antibiotic-resistant bacteria that’s been confirmed in 27 states. ...

At a Glance Cases of influenza A (H3N2) have decreased, but cases of influenza B are on the rise. Five pediatric deaths were reported for the week ending March 11, bringing the season's total to 133. It's not too late to get a flu shot, the CDC says. The Centers for Disease Control and Prevention says the flu season is not over yetand issued a warning about a new wave of influenza B that's on the rise. The strain of...