Nasal antiviral blocks SARS-CoV-2 infection in mice

SARS-CoV-2, the virus that causes COVID-19, has continuously mutated since it emerged in late 2019. This rapid evolution poses challenges for vaccines and treatments designed to target the virus. A booster shot is now needed to produce antibodies to fight off the Omicron variant of SARS-CoV-2. And several combinations of antibody treatments approved earlier in the pandemic don't work well against Omicron.

source https://medicalxpress.com/news/2022-04-nasal-antiviral-blocks-sars-cov-infection.html