The COVID-19 pandemic

[taylortbb]

And, perhaps it can be given to people who have been already vaccinated with an inferior vaccines (Pfizer and Moderna) -- if it holds true that it's 100% effective against serious illness.

But, big ifs. Real world is different than trials 99/100.

I believe Moderna was also 100% effective against severe outcomes during the trials, it was at least 100% effective at preventing death. When your sample size is small, and doesn't include profoundly immunocompromised people, it's not that hard to get 100%.