In the last couple of years, there has been a lot of conjecture as to what approach works best in combating SARS-CoV-2. Research around the world is hinting at the potential for nasal sprays to both protect and limit the viral load of those taking on viruses.
The link below points to one of many clinical studies on the subject of nasal sprays.
Intranasal therapy and COVID-19: A comprehensive literature review (probiologists.com)
