At the risk of responding to a throw-away comment: https://www.technologyreview.com/2021/01/13/1016098/moderna-variant-coronavirus-vaccine-update/ https://www.

At the risk of responding to a throw-away comment: https://www.technologyreview.com/2021/01/13/1016098/moderna-variant-coronavirus-vaccine-update/ https://www.technologyreview.com/2021/01/13/1016098/moderna-... They can retool very, very quickly. The slight unknown is running another trial.