I particularly like the nose spray application. If even non-susceptible people get in the habit of using a nose spray before starting their day, any contagious

I particularly like the nose spray application. If even non-susceptible people get in the habit of using a nose spray before starting their day, any contagious viruses that they may already have could be covered with an inactivator upon sneezing them out. Hypothetically this could protect susceptible people who inhale the sneezed out viruses.