So far, COVID-19 has mostly impacted countries with decently functioning health care systems. However, experts and the WHO have expressed a great worry. What happens should we see clusters of cases where there is no good health system? This includes poorer countries, particularly in sub-Saharan Africa and populations in the midst of some humanitarian crisis.  To help us understand the potential impact of coronavirus on vulnerable populations around the world is Dr. Paul B. Spiegel. He is the director of the Center for Humanitarian Health at the Johns Hopkins University Bloomberg School of Public Health, where he also works as a professor.  As it happens, Paul B. Spiegel was in the midst of a project to model scenarios around COVID-19 and the Rohingya refugee population in a region of Bangladesh called Cox's Bazar. We spend a good bit of time discussing that particular humanitarian crisis, while also discussing the broader implications of COVID-19 spreading to places that are already in the midst of a crisis.    https://www.undispatch.com/