I have 3 teen daughters and I staggered all their shots when they were kids- only 2 at a time, only 1 aluminum-containing at a time. I also skipped a few of them all together (no MMR, gardisil, chicken pox, flu) and no covid for any of us. My daughter had a seizure as a baby after a round of shots that was on the APA schedule (5 at a time) and ended up in the hospital, which is why I researched the HECK out of every ingredient in every brand and changed to the schedule I mentioned above.