WHO: "Avian flu, or Bird flu, A H5N1, is back"

The World Health Organization is monitoring closely the development of the deadly Bird flu virus, A H5N1, which has killed 40 people so far in Egypt and which has affected people in five different countries since it reappeared in 2010, after a break of seven years. The WHO warns that the virus has met all the prerequisites to start a deadly pandemic bar one.