IMHO, I really doubt that a regulator immersed in water, regardless of configuration, would be a serious risk of contracting Covid.
If it's good enough for washing lettuce, it's good enough for diving in salt or fresh water.
I only dive in warm tropical water (my choice) and that includes mostly Coz and GC. I do DIR long-hose donate in OC single and it's never been an issue when I go over pre-dive stuff with my dive buddy of the day. (I travel solo for most dive trips.) I see lots of "Air-2" or "AirSource" setups too. (I used to dive with one) No biggy to me.
Back On-Topic...
I really think this no-primary donate thing is being blown out of proportion in so far as a genuine risk factor.
I would simply choose NOT to dive with a Dive Op that has this ridiculous mandate. No drama, no whining, no panties in a bunch.
JMHO/YMMV
If it's good enough for washing lettuce, it's good enough for diving in salt or fresh water.
I only dive in warm tropical water (my choice) and that includes mostly Coz and GC. I do DIR long-hose donate in OC single and it's never been an issue when I go over pre-dive stuff with my dive buddy of the day. (I travel solo for most dive trips.) I see lots of "Air-2" or "AirSource" setups too. (I used to dive with one) No biggy to me.
Back On-Topic...
I really think this no-primary donate thing is being blown out of proportion in so far as a genuine risk factor.
I would simply choose NOT to dive with a Dive Op that has this ridiculous mandate. No drama, no whining, no panties in a bunch.
JMHO/YMMV