190 pounds of water is about 87 liters. You can obtain a 3 log reduction in the concentration of viruses with a CT value of 2750. That means that if you could maintain a concentration of chlorine dioxide of 2 PPM in the body for a period of 1375 minutes, or about 23 hours, it would be possible to significantly reduce the virus.
To treat 87 liters of water with a target of a concentration of 2 PPM, you would need about 1.3 ml of 22.4% sodium chlorite, fully activated to release all of the available chlorine dioxide. I find that my drops work out to 17 drops per ml, so this would be about 22 drops. If this was split over 4 liters of water, the chlorine dioxide concentration in each liter would be around 47 PPM. This is high enough to cause adverse effects, so let's stretch the time period to 48 hours and cut the concentration in half. This is totally possible, and it is possible that it could be done with minimal adverse effects.
If it were possible to evenly distribute this concentration of chlorine dioxide throughout the body, the oxidation of viruses with chlorine dioxide would be possible...
I have no idea if this is practical from a physiological perspective, but it is reasonably easy from a chemical perspective.