I hosted a wedding recently in my garden. We all had lateral flow tests beforehand and wore masks during the ceremony.
It was outdoors of course so not really comparable to your situation.
DS has had one vaccine but took a bad reaction so isn't planning a 2nd.
The vaccine is not 100% effective.
Your DS will have a far worse "reaction" if he gets covid!!! Alot of people have felt rough after having the first vaccine, myself included. My good friend who is a retired immunologist says that those who have had a "reaction" after the vaccine, may have had mild covid at some point. Having an A and E doctor daughter who has admitted many a very sick patient, many of whom have unfortunately died of covid, to not be vaccinated fully is just plain madness, not only for your own health but other people's. I would not have anyone in my home who is not doubly vaccinated. And for all those cynics out there, we are never going to get rid of covid unless everyone gets doubly vaccinated and accepts the boosters. Those who refuse, in my opinion, should have restrictions put upon them. My daughter has not put her own life at risk over the past 18 months for idiotic people who refuse the correct dosage of the vaccine and continue spreading the virus throughout our society. In the past 100 years, if mass people had refused polio, rubella, diphtheria etc vaccines, we would still have these diseases rampaging through our society. Stop the selfish, uneducated reactions and get vaccinated!!