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3 天前Is it accurate to understand this as putting the lungs’ immune response into a heightened state of response/alert? It doesn’t sound like it’s training the immune system about specific pathogens (or families of them). If that’s true, why doesn’t the body just do this already — is there a cost associated?

I was hesitant to get the vaccine when I was just making a personal tradeoff. Seeing the whole “flatten the curve” catastrophe of COVID, and the resurgence of measles now, I think the major benefit is herd immunity / protecting vulnerable individuals.