A small but growing number of H5N1 avian influenza infections have been detected in humans. The World Health Organization on Thursday urged countries to step up surveillance for bird flu after the ...
GENEVA >> A World Health Organization official on Thursday called for stronger surveillance in animals for evidence of infection with H5N1 bird flu in order to curb its spread. The official also ...
GENEVA — A World Health Organization official on Thursday called for stronger surveillance in animals for evidence of infection with H5N1 bird flu in order to curb its spread. The official also urged ...