Not in direct reply to your post, but slighty interesting anecdata: I likely caught COVID-19 1-2 days ago (light fever, headaches, loss of smell, but no runny n

Not in direct reply to your post, but slighty interesting anecdata: I likely caught COVID-19 1-2 days ago (light fever, headaches, loss of smell, but no runny nose): I gargled with Zinc as I noticed the first symptoms, had Cinchona bark tea yesterday. After a day, almost all symptoms disappeared except for the loss of smell, which is generally considered a late-stage symptom. Given that the common cold without any treatment typically lasts around 5 days or so, it might point to some efficacy of the treatment.