The European Union’s drug regulator on Monday backed more flexible storage for Pfizer-BioNTech’s COVID-19 vaccine, allowing for unopened thawed vaccine doses to be stored in a normal refrigerator for up to one month.

The European Union’s drug regulator on Monday backed more flexible storage for Pfizer-BioNTech’s COVID-19 vaccine, allowing for unopened thawed vaccine doses to be stored in a normal refrigerator for up to one month.