Even that's not true. 15-30% of the viruses that are attributed to the common cold are coronaviruses, and it's pretty clear that the common cold does not behave in the way OP described.
Do you know about genetic drift/shift/different strains?
Moreover, recent literature continues to confirm that you have protective immunity after recovering from covid like any other coronavirus. This is the basis for convalescent plasma therapy
Yes, but you’re drifting from the original point I was arguing against: “all viruses act exactly like the flu, therefore governments overreacted by not immediately assuming it was exactly like the flu” - which has a false premise.
