You just worry too much over this virus. None of those matter if the virus concentrations are low & you would minimize to be exposed in high concentration area by often cleaning your hands, not touching your nose with your dirty hands, social distancing, wearing PPE when social distancing is not possible, etc.
If you hangout in hospital or with sick people without PPE. You would be exposing yourself with the high concentration of the virus.
High humidity, high temperature (summer time), and outdoor would lower the virus concentration. Diving is the perfect scenario for this.
Basically I would practice all these steps in my next liveaboard trips. My next one is in July. I’ll report to you if I get knock out by the virus & still alive (knock on wood). From then on I’ll have diving trips lining up every month till December.
July - Guadalupe, Mexico
August - Jupiter, Florida
September - Cocos, Costa Rica
October - French Polynesia
November - Tiger Beach, Bahamas
December - Raja Ampat, Indonesia