My nephew has Covid and I'm worried

He lives in Kyiv, Ukraine and had just gotten back from a vacation in Greece with his wife. So far, he says, he is only mildly ill, was on day 4 yesterday. He is 41 and very fit. He and his wife have a 15 month old daughter. The wife and daughter are not sick at all, he says. Still, I am worried, as they may have been exposed before he knew he was sick, and I'm dubious of the medical care there (although they did a bang-up job with the daughter, who was an early birdie and a breech birth, much better than would have been done here in my estimation). So if you would please lift a prayer to whatever deity you recognize, or hold them in the light, or whatever you do, I would appreciate it. Thanks.