Millions of people are now being immunized with mRNA vaccines from Pfizer-BioNTech and Moderna. Both vaccines have very high efficacy and look safe in the short-term. This video reviews experience with the vaccines since they were authorized for use in December 2020. (Produced February 2021).

0:00 Introduction
0:26 How mRNA vaccines work
2:11 Efficacy
2:56 Prevention of symptoms vs infection and transmission
5:00 Safety
5:43 Post-authorization safety surveillance
6:39 Data on anaphylactic reactions
7:26 Experience since authorization

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