11 marzo 2015
Since December, an outbreak of swine flu in India has killed more than 1,200 people, and a new study suggests that the strain has acquired mutations that make it more dangerous than previously circulating strains of H1N1 influenza.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/Yve4O6lJnYI/150311124429.htm
