Covid passes: How are they used, are they ethical and do they work?

Scientists call for urgent investigation into covid-19 animal origins

Thailand develops robotic system to squeeze out more vaccine doses. As Thailand struggles with its worst coronavirus outbreak yet, researchers in the country have developed a machine to draw out COVID-19 vaccine doses more efficiently and optimise lower-than-expected supplies.

Covid-19 news: Vaccine protection wanes within six months, study hints