弱毒→強毒→弱毒

どんなに大騒ぎしても、スペイン風邪の時も２年たったらみんな気にしなくなった。今はその２年先を目指すべきだと思う。

— みほちゃん(理事じゃない♡） (@Mihoko_Nojiri) May 14, 2020

Deadly second wave

Soldiers with a mild strain stayed where they were, while the severely ill were sent on crowded trains to crowded field hospitals, spreading the deadlier virus. The second wave began, and the flu quickly spread around the world again.

End of the pandemic

After the lethal second wave struck in late 1918, new cases dropped abruptly – almost to nothing after the peak in the second wave


Another theory holds that the 1918 virus mutated extremely rapidly to a less lethal strain. This is a common occurrence with influenza viruses: there is a tendency for pathogenic viruses to become less lethal with time, as the hosts of more dangerous strains tend to die out[7]

　スペイン風邪の場合、最初弱毒の感染病だったが、重傷者は混んだ列車で混んだ病院に運ばれ、重症化するほどの強毒のウイルスが世界に拡散。

ところが、強毒化したウイルスにやられると、ウイルスが他に感染する前に感染者は死んじゃうから、第二波が感染のピークをむかえると突然、強毒性の感染は沈静化した、と。

ーーーしかし、二年だか三年だかわかんけど、窮屈で不安な生活は・・・・たまらんな。