There wasn't no data, just not specific statistical data from experimentation with these vaccines. Experts had data on previous vaccines, general knowledge of s

There wasn't no data, just not specific statistical data from experimentation with these vaccines. Experts had data on previous vaccines, general knowledge of symptomatology, contagion, etc. It's only reasonable that reasonable experts might differ on the specifics given the level of extrapolation, but that's not "no data".