New bird flu poses "serious threat", scientists say
By Kate Kelland LONDON (Reuters) – A new strain of bird flu that is causing a deadly outbreak among people in China is a threat to world health and should be taken seriously, scientists said on Wednesday. The H7N9 strain has killed 24 people and infected more than 125, according to the Geneva-based World Health Organization (WHO), which has described it as "one of the most lethal" flu viruses. …