> > ｺﾛﾅ鍋が終わって普通の日常が戻ってきたな(;´Д`)完全に
> 今年の冬にまたすごいの来るって煽っておいてたいしたことないｵﾁになると思う(;´Д`)

The epidemiological potential of a virus tends to unfold in waves. Age groups and geographical areas not affected 
initially are likely to prove vulnerable during the second wave. Subsequent waves have tended to be more severe, 
but for different reasons. In 1918, the virus mutated, within just a few months, into a far more virulent form. In 1957, 
schoolchildren were the primary vectors for spread into the general community during the first wave. 
The second wave reached the elderly, a group traditionally at risk of severe disease with fatal complications.

参考：2020/05/20(水)19時22分59秒