I suggest reading the package insert for ANY vaccine you are going to give, that has way more information in it than what you will find anywhere else, and IMO always makes for interesting reading. The Rotarix one can be found
here
The rotavirus vaccine was never on my radar. I had an ebf baby and bf babies don't tend to get rotavirus in the first place, and if they do it tends to be milder as human milk has a protein in it that binds to rotavirus and prevents replication. There wasn't a Rotavirus vaccine when DS1 was a baby.