Great news, initial Phase 3 results from the Pfizer/BioNTech mRNA vaccine show 90% efficacy. https://www.pfizer.com/news/press-release/press-release-detail/pfizer-and-biontech-announce-vaccine-candidate-against
This is an amazing result, vaccines are rarely this effective. The vaccine should be available to health care workers at the beginning of 2021, or maybe even in December given the lack of serious side effects. This is the one that needs to be stored at -70C (-94F). The two doses are given three weeks apart.
Moderna likely will report similar results in the next three weeks.