An old debate has been reignited after a review declared the effects of masks is uncertain and in need of further investigation. 

Meanwhile Sydney scientists have found a receptor that sticks to the coronavirus and pulls it away from lung cells, opening up potential treatment avenues. 

But for now, vaccines remain the best protection against severe disease. So when should you get your next booster? We answer some common questions. 

References: 

• Physical interventions to interrupt or reduce the spread of respiratory viruses
• Yes, masks reduce the risk of spreading COVID, despite a review saying they don't
• Fibroblast-expressed LRRC15 is a receptor for SARS-CoV-2 spike and controls antiviral and antifibrotic transcriptional programs