AstraZeneca is reporting today (Monday) that its vaccine is 90% effective. That makes 3 very promising vaccines (now AstraZeneca along with Moderna and Pfizer). While the AstraZeneca vaccine uses a different technology from the other two and is slightly less effective (90% vs 95%) it has other advantages like being much easier to store/transport and cheaper. The really important thing though is that it adds more capacity to the total that will be available for early vaccination.