How Pfizer and Moderna can update their mRNA vaccines for Omicron in 52 days

The emergence of the Omicron variant could mean existing vaccines won’t be as effective as they have been.

Deborah Fuller, a microbiologist who has been studying mRNA and DNA vaccines, explains how quickly the current vaccines can be updated.

1. Will we need to update vaccines to deal with the Omicron variant?

Coronaviruses use spike proteins to attach to