The Black Biomedical Research Movement at the University of Colorado at Boulder will host a presentation by Virginia Richardson, cancer survivor, at the Juneteenth Black Health Expo at the Gipson Eastside Family Health Center, 501 28th St. in Denver, on June 15 from 1:45 p.m. to 2:15 p.m. Richardson, a single mother of three children, will give a lecture on her efforts to promote minority health care.