A zinc tablet (10-80 mg) dissolved slowly in the mouth, lavaging the throat and nose, while lying down will cease coronaviral replication on most of the surfaces of the upper respiratory system. Zinc sprays also work. This must be done within the first 3-4 days of infection with covid-19.
The covid-19 virus' usual course is to first infect the eye, nose and/or throat and then, after ~3 days, move down into the lungs.
If chloroquine (mg) stops the virus in the bloodstream then the combination of (dissolved zinc in mouth + chloroquine pill (up to 500 mg of chloroquine per day) should slow (if not stop completely) the virus, allowing time to clear the virus from the body without raising an excessive immune response ("cytokine storm"). But this treatment must be done within 3-4 days of contracting covid-19.
These medicines are cheaply available now.