‘With Covid-19, immunity — whether from an infection or a vaccine — is expected to wane over perhaps a few years; that is what happens with the four human coronaviruses that cause colds. If that pattern extends to this virus, people will gradually become more susceptible to the virus after some amount of time (though they may be less likely to get a severe case). Tracking the levels of the different correlates could provide clues to how long immunity lasts, and when a person becomes vulnerable again. It could also indicate when people might need another dose of the vaccine.’
Read here (STAT News, June 11, 2020)
