[aquadrop]

Yep, maybe they had some data about protection level rising since first shot, fewer people getting sick already etc. It's hard to understand from just the Figure 4 how much of that increase is booster shot and how much is just level rising with time, too bad they didn't investigate this. Having top level protection vaccine with 2 shots is of course great and may be what you would be aiming for in "normal" times, but when it's race against the time trading several efficiency percents for quicker population coverage may be worth it. Yep, J&J one is the only candidate requiring one shot. Hopefully it will show some good results soon as well.