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(一)传染源。甲型H1N1流感病人为主要传染源,无症状感染者也具有传染性。目前尚无动物传染人类的证据。(二)传播途径。主要通过飞沫经呼吸道传播,也可通过口腔、鼻腔、眼睛等处黏膜直接或间接接触传播。接触患者的呼吸道分泌物、体液和被病毒污染的物品亦可能引起感染。通过气溶胶经呼吸道传播有待进一步确证。
(A) source of infection. Influenza A H1N1 influenza patients as the main source of infection, asymptomatic infections are also contagious. There is no evidence of animal transmission to humans. (B) the route of transmission. Spread mainly through the respiratory tract droplets, but also through the mouth, nose, eyes and other mucosa at the direct or indirect contact with transmission. Inhalation of respiratory secretions, body fluids, and contaminated items from the patient can also cause infection. Transmission through the respiratory tract by aerosol remains to be confirmed.