My son is now 3-1/2yo so no rotavirus when he was 4mo.
He had such an alarming reaction to his 2mo shots that the ped agreed to split the 4mo shots. He got them at 5mo (he was born at 35wks not fully developed to gestational age, but not horrible--9 days in NICU/SCN and went home no monitors, etc.). ETA: He received the shots in two doses: the first was for Hib (2nd) and PCV7 (2nd). Two weeks later, he got DTaP (2nd), IPV (2nd). The worst of it was after the second set of shots... I think he was still fighting off the first set.
It was my first child and I was in the hospital from 30wks--just as I learned that I might want to question vaxing.

So I got bullied. Alot. Shocking if you know me--I'm totally not the type.
At 4 mo. his reactions were excessive mucous production and he would throw it up and it would then cover his muzzle area--causing him to stop breathing. I remember carrying him down the stairs, him vomiting like this, and then FREEZING in panic--barely able to scream for my husband because he was turning blue. His temp dropped (at one point) to 95.9 degrees (ped blew it off to the house being too cold--and it was cool, but...). Slept A LOT.
ETA: The mucous reaction now makes sense: at about 10mo. he was dx'd with a mild IgA deficiency (an immune deficiency) that affects all the linings of the body--many of which are covered with mucous and produce mucous to protect his body. So I don't know if he had it before or if the vaxes shot him down, but clearly his body was trying to fight off something it couldn't fight off. Mucous is often an indication of allergic reaction when found in the diaper; but not sure if it's the same when you're throwing it up.
He spent most of July zoned out. And I mean completely zoned. Like vegetative about 30-50% of the time.
I took him to the emergency care clinic 2 weeks after the shots at which point they said he appeared to be recovering from pneumonia and should've been there 2 weeks ago. The ped returned our 2 calls and never thought she needed to see him. She blew it off to first-mother-panic/paranoia.
At the time, we truly believed he was reacting to the PCV7/Prevnar. Ped wouldn't say anything about agreeing, but I noticed that she changed the PCV7 shot in his 6-month shots (he got half of them and I finally grew a set of balls... and changed peds).