blog posts How do COVID vaccines affect periods? Survey lays out some clues. Jul 19, 2022 1:15 pm by Popular ScienceIllinois in the News Share on Facebook Tweet Email Images Popular Science (July 15) 'We shouldn’t be surprised that the uterus, which is an immune organ, is going to be impacted by an immune treatment like the vaccine,' says U of I biological anthropologist Kathryn Clancy. Share on Facebook Tweet Email