Roommate hanging out with someone exposed to coronavirus ?!?!

My fiancé and I have had our friend living with us for a year since his mom passed (he just turned 19 the other day) and some of our other friends came into contact and were staying with a woman who tested positive. My friends didn’t know until a few days ago and told me they were “quarantined” keep in mind I literally haven’t hung out or seen these friends since January. I have a toddler and am 30 weeks pregnant. I haven’t left the house besides for the doctors. Well they just showed up at our house and he decided to leave with them for a few minutes to go look at something (a fox screaming, they thought it was a woman) and I’m pissed. I can’t tell him to leave or anything. He has absolutely no money and now where to go. But I’m over this. We’ve wanted him out for a while but he absolutely refuses and sleeps on the floor in my daughters room. She sleeps with me so that’s fine but the whole room stinks cause of him. And now I have to worry about the damn virus cause his selfish ass. What do I even do?? He refuses to move but I’m not going to call the cops on him. I’m just pissed, annoyed. Over it.