Dr. Wilbur Chen

Infectious disease expert addresses questions about whether UMB should reinstate a mask mandate and if vaccinated people can infect unvaccinated people with the Delta variant.


Wilbur Chen, MD, MS, professor of medicine at the University of Maryland School of Medicine (UMSOM) and chief of the Adult Clinical Studies section at the Center for Vaccine Development and Global Health at UMSOM, discusses COVID-19 and the Delta variant. Watch the video in which he answers these questions:

  • Should UMB reinstate a mask mandate for everyone?
  • Will we need a booster shot soon?
  • Can vaccinated people infect unvaccinated people with the Delta variant?
  • Is it safe for unvaccinated people to work indoors since more than 90% of UMB staff are vaccinated?
  • What most concerns you about the Delta variant?
  • What can you say to help the vaccine-hesitant overcome their concerns?
  • Is it safe and necessary for kids to be vaccinated? And when will a vaccine be available for them?
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