If our immunity from COVID vaccines is waning, then wearing a mask to prevent infection is even more valuable. But not many people seem to be thinking that way when they’re out and about.
Many countries are winding back COVID-19 restrictions, but governments should be continuing to promote the importance of voluntary mask use and catching up outdoors.
Quantum computers, making greenhouse gases useful, COVID-19 infection from droplet spread and water security were some of the most popular engineering stories in 2020.
A study led by Professor Raina MacIntyre raises questions about the risks of infection for people singing in groups, especially in poorly ventilated rooms.
