4° C COVID Vaccine Storage 4° C COVID Vaccine Storage. While much has been said about the need for the Pfizer and Moderna coronavirus vaccines to be kept at temperatures much colder than a standard 4° C refrigerator, there still is a use for this sort of chamber in COVID vaccine storage. Once removed from its freezer (or in the case of the Pfizer vaccine, its specialized packing material), the vaccine must be thawed before it can be administered. The FDA does allow for the vaccine to be thawed at room temperature but prefers it to be thawed in a refrigerator, as it then can be stored for up to five days before it is spoiled. In the case of the Moderna vaccine, it can be kept in a 4° C refrigerator for up to 30 days after it is thawed. Several newer candidate vaccines, including ones produced by AstraZeneca and Janssen, can even be stored for longer terms in 4° C refrigerators with no fear of spoilage. Since 2003, Darwin Chambers has proudly been a leader in scientific environmental chambers and cold storage. Laboratories, hospitals, and pharmacies across the world rely on our critical temperature control products every day. We offer a full line of refrigerators, freezers, and stability rooms built to exceed ICH and FDA temperature stability requirements. All our products are built in the USA by certified professionals to exacting standards with easy-to-use controls, precision temperature management systems, and technical support for the life of the unit. Darwin Chambers' antimicrobial coating on door handles and our Quick Ship program that guarantees delivery within fifteen business days of your order. We also offer vaccine contract storage options for short-term surge storage requirements. Talk to us or request a quote today.