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"Researchers at the University of Helsinki have developed TriSb92, a molecule that can effectively prevent infection from all known SARS-CoV-2 variants when administered nasally."

It's passed animal testing and will now be tested on humans. As yet unknown how long it keeps protecting humans against #COVID19 #vaccine

https://scitechdaily.com/game-changer-nasal-spray-a-universal-shield-against-all-covid-19-variants/