WDW History nut
The Oxford vaccine looks like it’ll re run tests again.7.8 billion people worldwide, at least 5-6 billion need to be vaccinated to snuff out this bug. Each of these companies maxes out at around 1 billion doses manufactured in all of 2021 (some a little higher and others lower). It will most likely take 5-7 vaccine candidates or more to get the job done (including Russia and China who are doing their own thing for the most part). The vaccine candidates made by Oxford/AstraZeneca and JnJ that don’t require deep freeze are even more critical for worldwide distribution.