I feel entitlement-vibes

Oh, "immune imprinting" and "original antigenic sin" are interesting terms to search for in your favourite tool to google scholarly articles - and then follow the thread of higher-prominence citing articles. There's a body of work on this in immunology predating 2020, and so generally free of the politicised stuff post-20, and it's interesting and informative.

Complexity. Trade-offs. They abound.