when the third shot- the first booster- came out, many people lied about taking meds that compromised their immune system and it wasn't questioned. I think @Unicorn even posted that the over the counter nasal spray Flonase had an immune compromising side effect, so if you took that, you'd qualify.
Now a new study says that shots and boosters last longer than expected in keeping people from getting really sick or hospitalized. That, of course, contradicts last week's study!