My thought exactly. Frankly I doubt the vaccine had any effect on him whatsoever -- his immune system probably just killed it as a virus.
The primary reason my father got the vaccine is we have a sick family member and the hospital won't let anyone who has not been vaxxed visit.
I would have gotten the vaccine for the same reason. However, for a very specific medical reason I cannot take ANY vaccines. Been that way for about a decade. I'm now happy about that.
PS I think the vaccine is dangerous and forcing people to take it is immoral. That said, you do what you have to for family if you can.