Just got a call from my brother. He, his wife, her

Just got a call from my brother. He, his wife, her parents, and my niece all are sick with Covid. Turns out the wife visited her gym before Xmas and then hosted the parents for Xmas. I know, beyond stupid. Passed them on Dr Yo's video on managing the disease from home. Not much more you can do. Please stay away from the gym. Facetime your relatives instead of visiting them.