Delivery of COVID vaccines directly to the lungs and nose can stop SARS-CoV-2 infections in their tracks, according to a trio of new studies in monkeys. The results also raise hopes that mucosal vaccines that offer ‘sterilising’ immunity — complete blockage of infection — could become a reality.

Delivery of COVID vaccines directly to the lungs and nose can stop SARS-CoV-2 infections in their tracks, according to a trio of new studies in monkeys. The results also raise hopes that mucosal vaccines that offer ‘sterilising’ immunity — complete blockage of infection — could become a reality.