Immune escape is not a binary. Natural infection produces t-cells trained on every viral protein rather than just ones on the surface, they don't prevent infect

Immune escape is not a binary. Natural infection produces t-cells trained on every viral protein rather than just ones on the surface, they don't prevent infections but get them under control. In the meantime memory b-cells accumulate and diversify with every exposure. Vaccine kick start was sure helpful, but natural adaptive immunity is not easy to outsmart.