This seems like the perfect time to institute 100% vote by mail.
Colorado, Hawaii, Oregon, Washington and Utah already have 100% vote by mail. 21 other States have vote by mail for certain elections.
States like Florida are already set up to go to 100% vote by mail. Florida has had no excuse absentee balloting for several years. It would be a simple matter to send a ballot out to everybody and close up all the polling stations.
Other States would need to set up a system and likely could not implement it for 2020.
But I think 100% vote by mail nationwide could be in place for 2024.
It clearly works well where it has been implemented, so there are really no excuses or valid reasons not to do it.