Scientists confirm new H7N9 bird flu has come from chickens

By Kate Kelland LONDON (Reuters) – Chinese scientists have confirmed for the first time that a new strain of bird flu that has killed 23 people in China has been transmitted to humans from chickens. In a study published online in the Lancet medical journal, the scientists echoed previous statements from the World Health Organization (WHO) and Chinese officials that there is as yet no evidence of human-to-human transmission of this virus. The H7N9 strain has infected 109 people in China since it was first detected in March. …