I upvoted you because I saved your comment as it's very valuable to me.

But to reply, if I were sick and were having trouble breathing (or thought it might go that way) and could only get quercetin, I'd take it every four hours including overnight. This year I was sick and took vitamin C every half hour and sometimes every 15 minutes while I was awake.

Edit: quercetin and zinc

I upvoted you because I saved your comment as it's very valuable to me.

But to reply, if I were sick and were having trouble breathing (or thought it might go that way) and could only get quercetin, I'd take it every four hours including overnight. This year I was sick and took vitamin C every half hour and sometimes every 15 minutes while I was awake.