Advertisement Dr. Chuck Callahan, co-director of the Baltimore Convention Center Field Hospital and vice president of population health at the University of Maryland Medical Center explains how efforts are shifting to smaller community-based vaccine clinics and why it's important to get vaccinated. University of Maryland Medical System COVID-19 incident commander Dr. David Marcozzi addresses how Maryland is pacing when it comes to people getting their shots and at what point he sees the population reaching herd immunity. He also talks about what parents can consider if they are hesitant on getting their child vaccinated. Loading more articles...