2009年初，墨西哥成为一种不可思议的疾病暴发中心。与以往总是袭击老年人的季节性流感不同，这种严重的呼吸道疾病影响年轻人。

In early 2009, Mexico was the epicenter of a mysterious outbreak. A severe respiratory illness was affecting young people, contrary to seasonal viruses that often attack the elderly.

youdao

2009年初，墨西哥成为一种不可思议的疾病暴发中心。与以往总是袭击老年人的季节性流感不同，这种严重的呼吸道疾病影响年轻人。

In early 2009, Mexico was the epicenter of a mysterious outbreak. A severe respiratory illness was affecting young people, contrary to seasonal viruses that often attack the elderly.

youdao