Maybe if they could get them into people's arms today, but it's almost certainly too late for that. The crime is that they've been sitting on this solution for two years.

Actual vaccine effectiveness numbers against modern variants are hard to find, and anything from outside China comes from a population in which most people have been infected.

The actual effectiveness of the Pfizer and Moderna vaccines, if hypothetically given in China a month ago, might be quite low.

BioNTech has been approved for foreigners but that's going to be too little, too late. China has a higher vaccination rate than the US but not in the elderly which is most at risk from Covid.