China starts using a COVID-19 vaccine inhaled through the mouth

The Chinese city of Shanghai started administering an inhalable COVID-19 vaccine on Wednesday in what appears to be a world first.

The vaccine, a mist that is sucked in through the mouth, is being offered for free as a booster dose for previously vaccinated individuals, according to an announcement posted on an official city social media account.

Needle-free vaccines may persuade people who don't like getting a shot to get vaccinated, as well as help expand vaccination in poor countries because they're easier to administer.