nostr:npub1f2ygl9q75ysqxuuraz6v3vyxlgvl8h50xyztahvqxdtp6eh46r8sqjm58m 

I don’t know the situation, but if Brother-in-law’s Dr (who presumably took into account your sister being vulnerable) told him to not bother with a booster, then any blame lies with the Dr?

I never had the reaction to jabs that you describe. If they affect you so much, then would you want the virus itself? Getting jabbed is in your self-interest.