> 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 fi

> 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.