Influenza
Wednesday, November 30th, 2005Excerpt of Influenza on Wikipedia:
Influenza is a contagious disease, caused by an RNA virus of the orthomyxoviridae family. It rapidly spreads around the world in seasonal epidemics, imposing considerable economic burden, in the form of health care costs and lost productivity. Major genetic changes in the virus caused three influenza pandemics in the 20th century, […]
