Have you ever wondered what type of mask is the best at keeping you safe? Or if it's true that wearing 2 masks helps reduce the spread of the virus (hint, it does!)? To get answers to all this and more, we interview Michael Diaz, epidemiologist and PhD student at Johns Hopkins Bloomberg School of Public Health. Mike helps us answer some essential questions about mask wearing to help us decide what works best for us and how we can think about this essential tool.