Thousands of pro-lifers came for the Jan. 23 march and concert at the National Mall and now the D.C. Department of Health has reported multiple cases of the potentially fatal disease reported in the weeks after, The New Republic reported. "The march is a big event for religious conservatives, this year attracting politicians such as Vice President JD Vance, Speaker of the House Mike Johnson, and Republican Representative Chris Smith," according to The New Republic. "Many on the right oppose vaccination, with some citing religious reasons, making the march a possible hotbed of measles infections." "DC Health was notified of multiple confirmed cases of measles whose carriers visited multiple locations in the District while contagious," the department said in a press release Sunday. "DC Health is informing people who were at these locations that they may have been exposed."