China has approved a swine - flu vaccine and is preparing to begin production . WHO spokesman Gregory Hartl told CNN , `` We have to be ready for the fact that there might be adverse effects . '' Sinovac Biotech has developed the vaccine , suitable for those aged three to 60 . There have been 5592 confirmed cases of flu in China 's 31 inland provinces .
China has approved a swine - flu vaccine and is preparing to begin production . Sinovac Biotech has developed the vaccine , suitable for those aged three to 60 . There have been 5592 confirmed cases of flu in China 's 31 inland provinces .