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US approves Pfizer vaccine storage for 2 weeks at higher temperature


Kyodo News

Washington, United States  /  Fri, February 26, 2021  /  02:20 pm
US approves Pfizer vaccine storage for 2 weeks at higher temperature

This picture taken on December 26, 2020, on the outskirts of Paris, shows the negative temperature of an ultra low temperature freezer at the arrival of the first shipment of boxes of Pfizer-BioNTech Covid-19 vaccines in the AP-HP central pharmacy before being transported to hospitals in Sevran and Dijon. - France's first doses of the Pfizer-BioNTech coronavirus vaccine were delivered early on December 26, 2020, to the Paris hospital system's central pharmacy outside the capital, an AFP journalist saw. A refrigerated truck brought the roughly 19,500 doses from the Pfizer factory in Puurs, northeast Belgium, to Paris, the capital's APHP hospital authority said, with pharmacy chief Franck Huet calling it a (AFP/STEPHANE DE SAKUTIN / POOL )

The US drug regulator said Thursday it will allow the coronavirus vaccine developed by Pfizer to be transported and stored for up to two weeks at conventional freezer temperatures instead of the ultracold conditions previously required.

"The alternative temperature for transportation and storage will help ease the burden of procuring ultralow cold storage equipment for vaccination sites and should help to get vaccine to more sites," the US Food and Drug Administration said in a press release.

Before Thursday's announcement, the FDA had required the vaccine to be kept in an ultracold freezer at temperatures between minus 80 C and minus 60 C for a maximum of six months.

With the change, vaccines may now be stored at minus 25 to minus 15 C for up to two weeks, the regulator said.

Pfizer is expected to seek similar approval from regulators in other countries. The vaccine developed by the U.S. pharmaceutical giant and its German partner BioNTech SE has been administered in Japan and other countries.

The Japan unit of Pfizer said Friday in Tokyo it has begun discussions with Japanese drug screening authorities on changes in conditions for the use of its COVID-19 vaccine.

Japanese health minister Norihisa Tamura told a press conference his ministry will thoroughly examine an expected request by Pfizer to allow vaccine storage at higher temperatures.

"If (the requested changes are) appropriate, we will include them in documents attached (to the vaccine) and inform local governments" in charge of administering vaccines, he said.

Last week, the two companies said they have submitted data to the FDA showing their vaccine remains stable for a total of two weeks when stored at minus 25 C to minus 15 C, which they say are temperatures more commonly found in pharmaceutical freezers.

They may be returned once to the recommended ultracold condition, but total cumulative time of storage between minus 25 C to minus 15 C "should be tracked and should not exceed two weeks," the FDA added.

For actual use, the vaccines are thawed and can be stored for up to five days at standard refrigerator temperature, between 2 C and 8 C. The vaccine can then be mixed with saline diluent and should be administered within six hours, during which doses can be stored at refrigerator or room temperature.

The FDA granted an emergency use authorization for the Pfizer vaccine in December.

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