In a perverse way it seems the best way not to catch Covid is to have already caught Covid.
Both recent studies and observational experience validate it is entirely accurate.
Countries with high levels of infection acquired immunity paid a very high price but they all had very muted BA.1/BA.2 waves. I’m thinking of India, Brazil, South Africa (who hardly noticed BA.2), etc.
All the “zero Covid” (including highly vaccinated) countries struggled.