@nwerneck I'm curious what the implications of this might be... I can think of tons of hypothesis some harmless some concerning. For example if batches are not uniformly distributed geographically, but rather certain batches go to certain regions, then it may just represent reporting habits in a region and not really indicate anything about the quality of the batches themselves. Could also be that fear of vaccine side effects might be greater in certain regions. Of course there is the most obvious interpretation that a specific batch may have been processed differently than others.