可能不久以后,我们只需注射一次疫苗,即可抵御所有流感病毒。2013年春天,一株此前从未感染过人类的流感病毒给中国造成了一场灾难。尽管这个名为H7N9的病毒是在鸟类中进化出现的,但经过突变,它传播到了人类身上,男性、女性、小孩都未能幸免。短短几个月,就有135人感染了H7N9,其中44人死亡。夏天来临时,H7N9病毒随之偃旗息鼓。 It may not be long before we just need a shot to get rid of all the flu virus. In the spring of 2013, a flu virus that had never been infected by humans caused a disaster in China. Although the virus, H7N9, evolved in birds, it mutated and spread to humans, and men, women, and children were all spared. In just a few months, 135 people were infected with H7N9, 44 of whom died. When summer comes, the H7N9 virus goes down.