US firm Moderna says its Covid-19 jab is 94.5% effective - similar to Pfizer's.

But the Moderna one could be easier to move around because, per AP report, while it needs to be frozen, once it is thawed it can be refrigerated for up to 30 days.https://t.co/xw8EaRwp4y

— Jack Maidment (@jrmaidment) November 16, 2020