First Covid-19 shot

My understanding is that it's the second shot that has a higher chance of resulting in adverse effects from the immune response from the higher concentration. Who here has had their second injection???

Another question for folks that have had either one (first or second) - Did the administering entity keep you under observation for 15 mins or so afterwards? Most places around here do to ensure there's no anaphylactic response. I'm curious what you guys are experiencing.
They made us wait 15 minutes before we could leave.
They did us inside a church, dont know what they do at a drive up?