[claudeganon]

There’s already evidence of reinfection with COVID, so herd immunity for the disease is unlikely.

https://www.vox.com/2020/7/12/21321653/getting-covid-19-twic...

[tux1968]

Don't vaccines require that mechanism in order to be effective?

[claudeganon]

Vaccines can either reduce the severity of disease or grant immunity for a period roughly comparable to the window of reinfection. Depending on the duration of immunity, a successful vaccine may require multiple doses per year.