Wearing a masking to protect yourself and others against the spread of the coronavirus has become something of a political, social, and emotional fireball. Should the vaccinated continue to wear them? Is a mask really necessary outdoors? So many questions remain, but the answers are hard to come by as health agencies, local officials, and even health experts seem to continually change their recommendations. On this week's episode, Monica Gandhi, MD, MPH, associate chief in the Division of HIV, Infectious Diseases, and Global Medicine at the University of California San Francisco, joins us to help break down what the science shows about masks and their ability to protect us.