Quote:
Originally Posted by Excargodog
There are four other common human coronaviruses that circulate and cause colds. Once you are exposed to any of these you are resistant to reinfection - but for only about nine months. Most animal coronavirus infections appear to give about the same period of resistance. It is possible that duration might be increased with a COVID-19 vaccine, but we’ll just have to wait and see.
Likely. Vaccine doses are tailored to produce the desired immune response levels, which is often better than the response typically acquired in a natural infection. Mild natural cases might get a weaker immune response since the immune systems work is done quickly, while serious cases might get a better response. Vaccines designers try to level the playing field on that. Upper limit is the point where higher doses start producing unacceptable side effects of vaccination.
But even a 6-month-duration covid vaccine would be better than nothing... would enable a recovery, with cumbersome logistics, but buy time for better vaccines.