COVID Booster: extra vaccine shots, 3D images of SARS-CoV-2, and spotting allergens

Five things we learned about COVID-19 this week.

mural with bob hawke on a wall holding a beer and sign saying 'every jab gets us closer to the pub'
A mural by the street artist Scott Marsh at Hawke's brewing in Marrickville, Sydney. Credit: Brook Mitchell / Stringer / Getty Images