No, you would need to drink 25-30L of tonic water for a preventative dose. For malaria. Coronavirus dose for an acute infection will probably be even higher.

No, you would need to drink 25-30L of tonic water for a preventative dose. For malaria. Coronavirus dose for an acute infection will probably be even higher. Quinine is super bitter, it doesn't take much for flavor use, and the stuff on the shelf is nowhere near the strength that would have been given for brits in tropical posts during those days.