AstraZeneca announced some results of their efficacy ratings based on their UK and Brazil trials, those are still ongoing in the US. Their best rating was 90% based on a half dose, followed by a full dose 28 days later. They don’t have any refrigeration requirements, and state they will be able to produce 3 billion doses in 2021. Hopefully we’ll get all these guys to the finish line and get back to normalcy in the second half of 2021.
https://www.astrazeneca.com/media-centre/press-releases/2020/azd1222hlr.html