I see articles like this: https://www.msn.com/en-us/news/technology/your-immune-system-is-imprinted-with-its-first-coronavirus-exposure/ar-AA16e57s and I get kinda confused. Is it saying that getting an updated vaccine (or recent infection) will somehow c*ckblock the immune system from being able to handle a new strain?
It means upon reinfection or booster, your body will create antibodies for the first strain or vaccine you were exposed to. This was the concern with the newest bivalent boosters, early tests showed they weren't that protective (against new variants) compared to the first vaccines, but they seem to be protecting people pretty well.
It means we probably won't be able to keep boosting forever, and will have to get different vaccines, or find a work around, or target different parts of the virus to invoke a better immune response, and probably sooner than later.