"In fact, Furness likens the immune system to a collection of photographs. When people take photos and put them away in an album, the photos don’t fade over time just because they aren’t being looked at regularly."

By that logic I must not need my yearly flu shot because my flu "photo" hasn't faded. Clearly if I wasn't exposed to rsv (and it's most recent variants) my immune system can fight it just as strongly because I have that photo from two years ago.

Also, tetanus vaccines every 10 years, that must be bs.