Farmer
Senior Moderator
The H7N9 avian flu virus greatly expanded its geographical range over the weekend, with two new human cases reported in Beijing in the north of China, and another two in Henan province in the centre. Up until now, the virus had been restricted to Shanghai and neighbouring regions on the Eastern seaboard. Experts worry that this new development may be the start of an expansion that may see H7N9 quickly fan out across large areas of China, and beyond.
There is still no evidence of any sustained human-to-human spread of the H7N9 virus. But the World Health Organisation confirmed on Saturday that Chinese authorities are investigating two suspicious clusters of human cases. Though these can arise by infection from a common source, they can also signal that limited human-to-human transmission has occurred.
http://www.nature.com/news/h7n9-bird-flu-poised-to-spread-1.12801
There is still no evidence of any sustained human-to-human spread of the H7N9 virus. But the World Health Organisation confirmed on Saturday that Chinese authorities are investigating two suspicious clusters of human cases. Though these can arise by infection from a common source, they can also signal that limited human-to-human transmission has occurred.
http://www.nature.com/news/h7n9-bird-flu-poised-to-spread-1.12801
