Squirt!

The Covid19 virus infects the respiratory tract. The virus is transmitted via aerosols produced as an infected person, talks, sings or coughs. The currently dominant Omicron viral variant appears especially transmissible because it infects higher in the respiratory tract. Some scientists consequently suggest that nasal vaccines offer the best chance of limiting Covid19 transmission (https://www.theguardian.com/world/2022/aug/20/covid-nasal-vaccines-scientists-hope-help-halt-transmission). Injected vaccines have a minimal effect on mucosal immunity. Delivering the vaccine via a nasal spray, appears more likely to strengthen this first line of the body's defence against viral transmission. More than 12 clinical trials of nasal vaccines for Covid19 are currently in progress.