Viruses are masters of outsourcing, entrusting their fundamental function - reproduction - to the host cells they infect. But it turns out this highly economical approach also creates vulnerability.
A Swiss tourist died Thursday of swine flu while visiting India, a local health official said, as the country grapples with an outbreak that has killed more than 400 people since the start of 2015.
Linsey Marr, a professor in the Charles E. Via Jr. Department of Civil and Environmental Engineering at Virginia Tech, is obsessed with flu transmission.
Nigeria on Thursday confirmed that the H5N1 strain of bird flu has spread from seven to 11 states within a week, resulting in the deaths of tens of thousands of poultry but no human cases.