DH had chicken pox as a grad student, age of 23. Yeah, he was quarantined like 3 weeks before finals. Not cool. He has scarring. OTOH, I had CP when I was 6, and have no scars.
He chooses to get the flu vax, I choose not to. We do delayed other vaxes for our kids, including CP, but at more like age 4 or 5 (before school).