TheYeti
Two Pair
In my opinion this is their choice, not yours. If they feel like they are well enough to come, they come. If they don’t, they don’t. There’s no way for you to know how sick they are.
lol! I got people who come to work who are obviously way too sick to be coming in, and they end up getting other people sick, causing more downtime. Based on that experience alone, you can't leave it up to the sick person to decide when they are "not sick".