One vax is every week is still quite a lot. I can't remember the source, but remember hearing that a 2 week minimum is recommended between vaxes to allow the body to react and recover. Some children take a week to recover from a vax. Not trying to put a dampner, but if you find your LO does have reactions, remember you can always take a bit longer to get them all done.

#1 had two doses of rotavirus vax, and got quite sick each time. Easily a week of yucky poos, fatigue, unsettled.. For this reason, i didn't give it to #2, and won't for #3 either.