Everyone should ensure your mouth and throat is moist, never dry. If you know you have been exposed, then take a few sips of water at least every 15 minutes. Why? Even if the virus gets into your mouth. drinking water or other liquids will wash them down through your esophagus and into the stomach. Once there your stomach acid will kill coronavirus. If you don't drink enough water more regularly, the virus can enter your windpipes and into the lungs.