meghan murray, professor of global health at harvard medical school.hank you both for being with us. david, let me start with you, all of these stories, these headlines, these anecdotes are chilling to read. talk about your own experience with exactly what we're talking about here, supplies, face masks, health care professionals on the front line, where you are. what's the situation like? >> thanks for being here. let me say first off, our health care workers are on the front line and they're providing care. we see ourselves as a resource to the community and that's one of the aspects they're willing to put themselves at risk. there are certainly a lot of shortages we're seeing around the country. if you look at the personal protectsive equipment that's so important for them to have barriers to not have contact with the disease is very important. we want to make sure our health care workers are safe. they need to be safe because of the services they're providing. and while we have not been using any bandannas, we still have a supply of personal protect