Scientists are concerned that while the deadly H5N1 bird flu virus remains hard for people to catch, it could mutate into a form that can become easily transmissible among humans and spark a pandemic.
Znanstvenici su zabrinuti kako bi smrtonosni virus H5N1 ptičje gripe, iako se i dalje teško prenosi na ljude, mogao mutirati u oblik koji se lako prenosi među ljudima i izazvati pandemiju.