They are spread from respiratory passages, through the cough and sneeze droplets deposited on doorknobs, desktops, coat sleeves and food tables.

• 病毒从呼吸道向外散播，通过流感患者咳嗽和打喷嚏时落在门把、桌面、外衣袖口和餐桌上的飞沫而传播。