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A comment on WHO says Covid-19 pandemic is 'one big wave', not seasonal. Parent comment

Re:WHO says Covid-19 pandemic is 'one big wave', not seasonal by mynegation on Tuesday July 28, 2020 @01:55PM (#23978684)
> Covid-19 hardly mutates and people who were exposed to SARS 17 years ago have immunity to covid today.

Citation, please. Any credible sources that I could find say that protection correlation with SARS is not clearly established and antibody levels to SARS fall off between 2-3 years after infection.

> there won’t be a second wave of any significance

There will or will not be but certainly not for the reasons you mention. Unlike flu and older coronaviruses, SARS-Cov-2 R_t seems to be driven exclusively by containment measures, not by seasonality, at least not at the present.

> once you've got sufficient exposure in the community a second wave won't happen regardless

We are nowhere near the "sufficient exposure" and it is already the most impactful pandemic in the last 100 years.

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Re:WHO says Covid-19 pandemic is 'one big wave', not seasonal by lbeltrame on Tuesday July 28, 2020 @02:01PM (#23978760)
> Any credible sources that I could find say that protection correlation with SARS is not clearly established and antibody levels to SARS fall off between 2-3 years after infection.

It was T-cell immunity, not humoral immunity like with antibodies. Absence of antibodies != absence of immunity.

And here's the citation: https://www.nature.com/articles/s41586-020-2550-z

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