https://www.siliconvalley.com/2020/12/17/what-we-know-about-modernas-coronavirus-vaccine-and-how-it-differs-from-pfizers/

Moderna’s coronavirus vaccine candidate is similar to the Pfizer-BioNTech vaccine that was authorized and shipped out to the first Americans earlier this week.

But there are a few key differences. Most importantly, Moderna’s vaccine can be stored in normal freezers and does not require a super-cold transportation network, making it more accessible for smaller facilities and local communities.