so, my argument the whole time has been that extra precautions need to be taken to protect those that are vulnerable, even as restrictions maintain lax in the general society. what that means is that the son, here, had a duty of care to his father, to ensure he did not introduce the virus into the house - and his parents had the obligation to ensure he understood it and acted through with it.
it actually sounds to me like the teenager was told that he would be safe if he wore a mask at that party, which is false. there is actually no sound reason to think that the individual would have avoided spread at that party with a mask on, unless he was using a medical grade mask, which he no doubt was not. the correct messaging to the kid should have been that the consequences of his overweight 42 year-old father's preventable medical conditions means he is strictly not allowed to leave the house - or to re-enter it if he disobeys.
and, does his father not bear some responsibility for his health conditions? this is not a 77 year old frail grandmother, who is weak due to age; this is a 42 year-old grown ass man that is overweight and diabetic. his condition is of his own making, and it is not at all fair that he impose a life of isolation on his family in order to protect him from his own self-destructive habits. while the family must make the choice to act to protect him, it is an infringement on their rights that they must, and some effort should be made to call him out on it.
so, while this is indeed the feared vector of transmission, from healthy and young people to those with underlying conditions, it is the household's own responsibility to ensure it's own safety and it's own health on an everyday basis, and the household that failed in this case. the father allowed himself to become fat and weak at a young age, and is dying from a virus that he should have easily beat. that said, to protect the irresponsible father, the teenager must have been ordered to stay in and kicked out if he refused to listen; instead, he appears to have been told to go out and have fun, just wear a mask.
don't blame the government for your own irresponsible behaviour. we will never evolve to a system of anarchism like that.
https://globalnews.ca/news/7188224/florida-dad-coronavirus-teen/