Pfizer and BioNTech were granted a temporary authorization for emergency use for their COVID-19 mRNA vaccine BNT162b2 by the Medicines & Healthcare Products Regulatory Agency (MHRA) in the U.K. This is the first Emergency Use Authorization following a worldwide Phase 3 trial of a vaccine to help fight the pandemic. The companies anticipate further regulatory decisions in the coming days and weeks and are ready to deliver vaccine doses following potential regulatory authorizations.
The MHRA’s decision is based on a rolling submission, including data from the Phase 3 clinical study, which demonstrated a vaccine efficacy rate of 95% in participants without prior SARS-CoV-2 infection and also in participants with and without prior SARS-CoV-2 infection, in each case measured from 7 days after the second dose. In the trial, BNT162b2 was generally well tolerated with no serious safety concerns reported by the Data Monitoring Committee to date. This decision is also based on a review of Pfizer’s and BioNTech’s Chemistry, Manufacturing and Control (CMC) data for BNT162b2.
In July 2020, Pfizer and BioNTech entered an agreement with the U.K. to supply 30 million doses of the BNT162b2 mRNA-based vaccine, once authorized for emergency use, which was increased to 40 million doses in early October. The delivery will occur throughout 2020 and 2021, in stages. The first doses are expected to arrive in the U.K. in the coming days.
Manufacturing and Cold Chain Shipping
Pfizer’s and BioNTech’s combined manufacturing network has the potential to supply globally up to 50 million vaccine doses in 2020 and up to 1.3 billion doses by the end of 2021 (subject to manufacturing capacity and regulatory approval).
Through its existing mRNA production sites in Mainz and Idar-Oberstein, Germany, BioNTech is able to produce mRNA for commercial supply after having already produced the vaccine candidate doses for the clinical trials. BioNTech will also increase its manufacturing capacity in 2021, once a third site in Germany will start manufacturing to provide further capacities for potential global supply. Critical to distribution in the U.K. will be Pfizer’s manufacturing site in Puurs, Belgium, one of Pfizer’s largest sterile injectable sites. The Puurs site is being used primarily for European supply but will also serve as back up supply to Kalamazoo, MI, for the U.S. market.
Pfizer has experience in cold-chain shipping and has an established infrastructure to supply the vaccine worldwide, including distribution hubs that can store vaccine doses for up to six months.
The companies have developed specially designed, temperature-controlled shippers for the BNT162b2 vaccine candidate, which can maintain recommended storage conditions (-70°C ±10°C) for extended periods of time without any additional equipment but dry ice. The shipper can maintain temperature for 10 days unopened which allows for transportation to markets globally. Once open, a vaccination center may use the specially designed shippers as a temporary storage solution to maintain the recommended storage conditions (-70°C ±10°C) up to 30 days with re-icing every five days in accordance with the handling instructions. Each shipper contains a GPS-enabled thermal sensor to track the location and temperature of each vaccine shipment 24 hours a day, seven days a week. Once thawed, the vaccine vial can be stored for up to five days at refrigerated (2-8°C) conditions.
