COVID-19 Nasal Vaccine Results Show Progress toward Transmission-Halting Approach

Research from the Washington University School of Medicine suggests nasal vaccines for COVID-19 could lower the risk of transmission more than injected vaccines. The nasal vaccine, recently approved for emergency use in India, was tested on hamsters who became infectious but couldn’t transmit the virus to others. In contrast, hamsters vaccinated with an injectable vaccine could spread the virus, underscoring the advantage of targeting the site of initial infection.