Scientists Develop Mobile Printing Device for COVID-19 Vaccine

Researchers have developed a mobile printing device they say can make vaccine patches that could be easily deployed to developing nations. The patches do not require refrigeration and could be self-administered by users, the research team says.

Source : https://learningenglish.voanews.com/a/scientists-develop-mobile-printing-device-for-covid-19-vaccine/7067312.html