WHO worries flu viruses are sharing genetic material quicker

A recent surge in human infections caused by bird flu viruses and a proliferation of the types of animal flu viruses sparking infections in people are events that need to be watched, the World Health Organization said Thursday. The growing number of viruses that have spun off from two main strains are creating a dynamic that is concerning, the global health agency said in an assessment of the evolving influenza situation. “Virologists interpret the recent proliferation of emerging viruses as a sign that co-circulating influenza viruses are rapidly exchanging genetic material to form novel strains,” the statement said. “The consequences for animal and human health are unpredictable yet potentially ominous.” Infections with H5N1 bird flu in Egypt have soared since last November, with 108 cases and 35 deaths. That is more infections in four months than any country has reported for an entire year since the virus started to cause massive poultry outbreaks and...