H7N9 is a bird flu strain of the species Influenza virus A ( avian influenza virus or bird flu virus ) .

H7N9 is a bird flu strain of the species Influenza virus A ( avian influenza virus or bird flu virus ) .

As of January 2014 , there has been no evidence of sustained human-to-human transmission ; however , a study group headed by one of the world ’ s leading experts on avian flu reported Reporting that several instances of human-to-human infection are suspected Suspicion .

The long journeys between venues on board the cold , uncomfortable tour buses adversely affected Influence the performers , with cases of flu and even frostbite .

Richardson , who had the flu , swapped Exchange places with Jennings , taking Creating his seat on the plane , while Allsup lost his seat to Valens on a coin toss .