Washington Post One spray works by blocking bacteria and viruses from reaching the nasal lining, thereby preventing infection. Scientists are researching at least two sprays that target the coronavirus where it most commonly enters our bodies — the nose. Both sprays are on the market, but it is unclear how and when to use them to protect against the coronavirus.
Most often, you get infected when you inhale virus-laden respiratory droplets and particles, which then invade the cells that line your nasal cavity. One nasal spray called pathogen capture and neutralizing spray (PCANS), marketed as Profi, forms a gel-like coating that aims to capture large droplets, and block bacteria and viruses from reaching the nasal lining, thereby preventing infection.