Oxford-AstraZeneca COVID-19 vaccine is up to 90% effective

Oxford-AstraZeneca has announced its COVID-19 vaccine is up to 90% effective US already has a deal to purchase 300 million doses for $1.2 billion. The British drugmaker is the third major drug company to report late-stage results for a potential COVID-19 vaccine. Pfizer and Moderna last week reported preliminary results from late-stage trials showing their vaccines were almost 95% effective. Unlike its rivals, however, the AstraZeneca vaccine doesn't have to be stored at ultra-cold temperatures, which makes it easier to distribute