H7N9 bird flu patient, surnamed Jia , is escorted from a hospital... Fotografia de notíciasCuidados de Saúde e Medicina,Doença,Hangzhou,Horizontal,Hospital,Leste,Paciente,Província de Zhejiang,Recuperação,Vírus da gripe aviária,Vírus de Influenza A subtipo H7N9Photographer Collection: AFP 2013 AFPH7N9 bird flu patient, surnamed Jia (front L), is escorted from a hospital upon her recovery in Hangzhou, east China's Zhejiang Province on April 19, 2013. Experts from the UN's health agency are examining whether the H7N9 bird flu virus is spreading among humans, after a cluster of cases among relatives, but downplayed fears of a pandemic on April 19. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)