Vietnamese officials say a ten-year-old girl has died of bird flu, the 12th confirmed victim in a month.
Medics say the girl developed a high fever and bad cough a week after helping her family bury some dead chickens.
She spent several days on a respirator before her death.
On Saturday, a 13-year-old girl died of the virus a day after her mother, whom she probably infected.
Scientists say more human-to-human cases are likely.
