I got Omicron in late December. I want to go to Canada in late July. Therefore I’m carefully planning my required booster for travel to Canada after 90 days (some think that’s how long it lasts) of natural immunity has expired, but within guidelines for travel.
I don’t want to mix a booster shot with existing natural immunity. Seems not a good idea.
But meanwhile every Cal State and UC student, even if they all got covid over winter break, has to be boosted IMMEDIATELY AFTER COVID therefore, before spring break starts.
Some think it lasts for years -- decades, even.