流感和呼吸道其它病毒性传染病(腺病毒病、鼻病毒病、副型流感等)都是人类最容易感染的疾病。俄罗斯每年有5千万到1亿5千万人次得此病,有的人一年感染2～3次。但不应认为,流感是一种举足轻重的疾病。若儿童和老人得流感,还会经常引发肺部发炎。流感病毒循环到血液中,并渗入白血 Flu and other viral respiratory diseases (adenovirus, rhinovirus, parainfluenza, etc.) are among the most susceptible to human diseases. In Russia, 50 million to 150 million people suffer from this disease each year, and some people are infected 2 to 3 times a year. However, flu should not be considered a pivotal disease. If children and the elderly get flu, they often cause inflammation of the lungs. The flu virus circulates into the blood and infiltrates the white blood