 We propose the nasal administration of calcium-enriched physiological salts as a new hygienic intervention with potential therapeutic applications in response to the rapid and persistent spread of COVID-19. Our studies on animals and humans have shown that aerosol administration of these salts can reduce the amount of virus or bacteria particles exhaled into the environment, making it more difficult for them to be transmitted between people. Additionally, our research has demonstrated that the salts can significantly decrease the number of particles exhaled by individuals, particularly those with higher particle counts. This suggests that the upper respiratory tract may be a major source of bio aerosols, and that the nasal administration of calcium-enriched saline could be an effective way to prevent the spread of the virus. This article was authored by David Edwards, Antony Hickey, Richard The Tickey, and others.