如果我们能研制一种对所有流感病毒株都有效的疫苗，我们就可以预防年度季节性流感及偶见的流感大流行，就像其它那些疾病一样。
If only we could develop a vaccine that was effective against all strains of flu, we might prevent both annual epidemics and occasional pandemics like the one now under way.
虽然猪流感病毒通常只会感染猪，但就像2009年H1N 1流感病毒一样，猪流感病毒具有潜在危险，可能引发人类流感大流行。
Although swine influenza viruses usually sicken only pigs, potentially one might also spark a pandemic in people, as occurred with the 2009 H1N1 influenza virus.
随着时间的推移，发生足够的变异后的禽流感病毒广泛传播，就像1918年发生的那场夺去了至少3千万人生命的西班牙流感那样。
Over time, an avian virus may gather enough genetic change to spread easily, as experts believe was the case with the 1918 Spanish flu, an event that killed at least 30 million people worldwide.
应用推荐