Participants answering yes to any of the above questions should not attend the Annual Meeting or come to McCormick Place West Convention Center. Please go to one of the following testing sites, while at McCormick Place West, The two closest locations are the Loop Medical Center (https://lab.loopmedicalcenter.com) or the Clear Wellness Group (https://clearwellnessgroup.com), both of which are located on Michigan Avenue.For additional testing sites in the Chicago area, visit the ASTRO website (www.astro.org/safety). If you test positive, please notify ASTRO at meetings@astro.org.