Europe's drug regulator on Monday recommended extending the storage time for the Pfizer-BioNTech Covid-19 vaccine at normal fridge temperatures to 31 days from five days, easing logistical challenges during rollouts in the region.

The change is applicable to unopened vials, the European Medicines Agency (EMA) said, adding that the advice by its human medicines committee came after assessing additional stability study data submitted by Pfizer and BioNTech...