The company came under scrutiny due to the incredible demands on maintaining its vaccine: the vaccine must be stored at temperatures of minus 70 degrees Celsius or below, and breaking the cold chain could render the vaccine useless.
To handle this issue – and others that might arise during transportation – Pfizer has specially designed temperature-controlled thermal shippers using dry ice to maintain that temperature.
Additionally, the containers will utilize GPS-enabled thermal sensors with control towers to track the location and temperature of each vaccine shipment.
“These GPS-enabled devices will allow Pfizer to proactively prevent unwanted deviations and act before they happen,” Pfizer writes in its distribution fact-sheet.
The cold containers can be reused for up to 30 days for storage, as long as dry ice is refilled every five days.