The secondary attack rate of seasonal influenza ranges from 5% to 15%. Current estimates of the secondary attack rate of H1N1 range from 22% to 33%.

季节性流感的续发率从5%至15%不等，而据目前估计，甲型h1n 1流感续发率在22%至33%之间。

youdao

The secondary attack rate of seasonal influenza ranges from 5% to 15%. Current estimates of the secondary attack rate of H1N1 range from 22% to 33%.

季节性流感的续发率从5%至15%不等，而据目前估计，甲型h1n 1流感续发率在22%至33%之间。

youdao