Here's what causes bronchitis, how the illness usually spreads and how you can treat symptoms if it affects you or a loved ...

and the data features the usual lineup of suspects — acute bronchitis, influenza, pneumonia, and respiratory syncytial virus (RSV). This year has also seen a surge in norovirus, a highly contagious ...

Chronic bronchitis caused by environmental irritants, for instance, is not contagious. But acute or viral bronchitis is. "Viral bronchitis can be spread from person to person by inhaling droplets ...