I have knowledge of 7 family members who took the 2 shot versions. They say they have had no side effects. I can tell you I prayed for them all, for their protection. Of those, the youngest one felt bad after the second one, but it cleared up in 24 hrs. The oldest one is not feeling so great a few weeks after but is old enough to not even consider the vax as the problem. I think it probably was the cause of the most recent problems, but she doesn't. I'm praying it's not related.