Only a few have come out against restarting so the best thing to do is respect their decision and deem them unavailable for the rest of the season, the majority want to return, get these tests done and restart.
Yeah, treat them like they are injured and unavailable, it is upto their club to deal with them after discussing the circumstances.
The players will be fully monitored by doctors using the latest testing and everything done/provided for them like Isolated hotels/transport/food etc, they will be much safer than the rest of us who will not get anything like that, if we can return to work, they can under those circumstances.
It seems to have gone well in Germany, so I think the PL will follow.