Inhaled Covid-19 vaccines developed by US, UK & Hong Kong may prove superior to injections

Researchers in the US, UK, and Hong Kong are developing inhaled vaccines as a potentially more effective covid-19 treatment than conventional jabs, according to Bloomberg.

The theory is that by targeting the nose and mouth, inhaled vaccines stand a better chance of preventing infection than injections, which scientists still aren’t sure can protect people from the virus.

Most vaccines in human testing require two shots for effectiveness, and developers still aren’t even sure if they’ll prevent infections. Scientists are hoping to generate superior immune responses with inhaled vaccines that directly target the airway cells the virus invades.