Maybe these type of discussions shouldn't occur at the dinner table..
OP what do you want to happen here? Do you want your DD to go nowhere but school and home? Do you want her to move out? If she moves out, lives with roomies and socializes, do you plan to never see her until this is over? Maybe your DD will move out, her roomie will give her CV and she'll be one of the unlucky young people that doesn't make it. Maybe your DW with bring CV home from school and give it to your DD. The possibilities of bad outcomes here is endless. So so many posters here have piled on the DD.
Everyone here who piles on the daughter as if she is a horrible person are sure quick to judge.
Just finished a rather unpleasant conversation with my 26 y/o daughter at the dinner table, she got up and tossed her food away and left the table crying...She says it's unfair and has to live her life ...
I doubt the daughter is horrible: she is a schoolteacher of young children, and is probably lovely. She is though very selfish and emotionally immature. At 26, she should be able to at least remain at the table and debate this out, and while continuing to eat is not too much.
Of sound mind, 7 months into a pandemic, she possesses a clear understanding of the SARS2/COVID (definitely... courtesy her school system, if not the media), has weighed the odds, and decided her 60-90 min of pleasure is more important than potentially infecting her parents, esp. her dad who is a cancer survivor. Yes, the possibilities are “endless,” but at this point in the game, the probabilities are clearer. This pandemic probably
will drag on, it will probably be many months before non-medical, non-high risk groups are immunized, and your daughter will probably have many more social events (conversing, laughing, and eating so
probably unmasked the whole time).
It is thus likely, and I would wager very likely given the numbers game, that she will be exposed to someone actively shedding the virus while socializing. Given that persons have contracted COVID despite minimal always-masked contact with the outside world, I think the more appropriate dilemma is not whether you could get the virus from her, but when she brings home the virus to you... how will that manifest in your body?
Sometimes it is difficult financial situations or an unwanted pregnancy that causes someone to grow up. Sometimes a war, or a pandemic. And sometimes... the loss of a parent.