Deaths in Shanghai from H7N9 are first cases of human infection

Two men in Shanghai have been confirmed dead from H7N9 infection, while a woman in Anhui province is in critical condition from the virus, the National Health and Family Planning Commission said on Sunday.

This is the first time a human infection from H7N9 has been detected. Little research has been done on this relatively unknown bird flu, and there are no vaccines against the virus.