長い付き合いになるかも？

COVID-19の免疫は数ヶ月で消える　https://t.co/aa7mrBQBCT
COVID-19罹患者，ピーク時には60%が強い抗体反応を示すが3ヶ月後は17%に低下。つまり複数回感染しうる。

— Spica (@Kelangdbn) July 12, 2020

“One thing we know about these coronaviruses is that people can get reinfected fairly often,” said Prof Stuart Neil, a co-author on the study.



Prof Jonathan Heeney, a virologist at the University of Cambridge, said the study confirmed a growing body of evidence that immunity to Covid-19 is short-lived. “Most importantly, it puts another nail in the coffin of the dangerous concept of herd immunity,” he said.


He added: “We would however expect that re-infection would be less severe for any individual as they will still retain immune memory allowing them to more rapidly respond. Nevertheless they could still be a source of onward transmission.

　再感染するが、２度めは軽いかも、と。

　ワクチンが全く無意味というわけではないだろうが、治療薬と併用だろうね。

　スペイン風邪の場合弱毒化して気にならなくなるのに２年ということだから、・・・・それまでなんとか凌いでいくしかないね。