Actually they did notice extra blood clots during the trials, but didn't think it was statistically significant [0] (15 blood clots versus 10 in the placebo gro

Actually they did notice extra blood clots during the trials, but didn't think it was statistically significant [0] (15 blood clots versus 10 in the placebo group, in a trial of 20k people). [0] https://www.cnn.com/2021/04/13/health/johnson-vaccine-blood-clots-cdc-fda/index.html https://www.cnn.com/2021/04/13/health/johnson-vaccine-blood-...