Good news — we should expect immunity to COVID-19 to last a long time.
This preprint says that COVID immunity lasts for at least eight months, yay!
This paper found antibodies to MERS six years after infection, and this paper found antibodies to SARS after SEVENTEEN years! (SARS and MERS are both closely related to COVID-19, so it’s reasonable to think COVID immunity would be similar.)
A case study discusses two kids who got Paediatric Acute-onset Neuropsychiatric Syndrome after COVID. If they found two, there are probably more. 🙁
In the interest of fairness, here’s a guy who says that closing schools leads to a significant drop in R 11 days later. I don’t think that’s what we see here, but I admit I have not tried to run the same analysis he did.