(Keith Weller photo courtesy ARS/USDA)

WHO says bird flu outbreaks raise alarm

London | Reuters — The risk of sustained human-to-human transmission of H7N9 avian flu in China is low, the World Health Organization said on Wednesday, but a surge in human cases there is worrying and requires constant monitoring. Outbreaks of H5 bird flu strains in poultry and wild birds across Europe, Africa and Asia are […] Read more