Already have NAC and olive leaf extract.
Also some expectorant OTCs.
Ordered Eucalyptus and germanium essential oils for diffuser/humdifier.
All that I have read about covid19’s bigger danger is fluid/mucus build up in the lungs, which most people can survive without aid/theraputics, but even if you survived, it wouldn’t be pleasant to go through. Things that might be difficult to procure later if there is a bum rush on them might just call for a little preparation.
Have you ever tried the Thieves Oil? I think I am addicted to the distinctive odor. I don’t know if it cures anything or prevents anything, but it smells wonderful.