RT @fitterhappierAJ
You all need to understand this.

The paper not only shows SARS Cov 2 mutating away from immunity

But also old infections holding immunity back-

immunity is worse off following another infection because of that earlier infection
https://www.theguardian.com/world/2022/jun/14/people-who-caught-covid-in-first-wave-get-no-immune-boost-from-omicron?CMP=Share_iOSApp_Other