Researchers at Stanford are looking to enroll 900 people in a federally funded long-COVID study to understand the long-lasting symptoms some people experience after a COVID-19 infection. KCBS Radio's Holly Quan and Matt Bigler spoke with Dr. Yvonne Maldonado, Professor of Health and Infectious Diseases, Pediatrics, and Epidemiology and Population Health at Stanford University, and one of the principal investigators of the new study.