My mother has been a mostly bedridden invalid from about 2 weeks after her first Pfizer shot. My dad had to have heart surgery to open up a blocked artery not long after the Pfizer.
My brother who is an airline captain was grounded for months after the Pfizer; he suffered from a swollen and inflamed heart. When the airline sent him to an out of state flight examiner to get him past his FAA physical he was back in the air for about two weeks. Then the airline informed him he was due for his booster. A week after getting it he was bedridden with chest pains because his heart was swollen and inflamed again. After a couple of months the out of state examiner cleared him for flying again. When he got another booster, the same thing happened. A doctor who was very worried about getting into trouble told him to never get another booster again. In our state if a doctor goes against the vaccines, they can take away their license.
My brother and his fully vaccinated wife and family have all had confirmed cases of Covid multiple times after the shots and boosters. This article helped explain why... which is why I posted it.
Lost my mother to same one.