While the two vaccines appear to have very similar safety and efficacy profiles, Moderna's vaccine has a significant practical advantage over Pfizer's. Pfizer's vaccine has to be kept at minus 75 degrees Celsius — or about minus 103 degrees Fahrenheit. Moderna's vaccine can be kept at minus 20 degrees Celsius, which is about minus 4 degrees Fahrenheit. That means Moderna's vaccine can be kept in "a readily available freezer that is available in most doctors' offices and pharmacies," said Dr. Tal Zacks, Moderna's chief medical officer. Another advantage of Moderna's vaccine is that it can be kept for 30 days in the refrigerator, the company announced Monday.

Source: CNN November 16, 2020 13:41 UTC