New viral mutation made middle-aged adults more susceptible to last year's flu

A possible explanation for why middle-aged adults were hit especially hard by the H1N1 influenza virus during the 2013-2014 influenza season has been uncovered by scientists. Their findings offer evidence that a new mutation in H1N1 viruses potentially led to more disease in these individuals.

Source: ScienceDaily Headlines - October 21, 2014 Category: Science Source Type: news