Roni Rosenfeld

Facebook & Carnegie Mellon University

Carnegie Mellon University researchers are working on figuring out how to forecast coronavirus transmission county by county across the United States.

Robert Pfeil / AP

The influenza virus spreads one person at at time.

According to the Centers for Disease Control and Prevention, an infected individual coughs, sneezes or even just talks, and airborne droplets land in the mouths and noses of other people up to 6 feet away.