MSNBC Katy Tur Reports October 15, 2021 18:24:00
Its 450 people, blind groups of 15 people each. and the study is done in a way that actually stacks the deck against measuring the effectiveness of a j&j booster versus the mrna. so even though theres a lot of press saying the mrna is a preferable booster to the j&j, its not so cut and dry because the kinetics of the immune response of the j&j are such that there is a delayed effect, it goes up much later, and that study cut it off at 29 days whereas the higher vaccine effectiveness occurred 80 ...
Source: archive.org