Throughout the coronavirus health crisis, health officials across the world have been advising people to take important precautions to protect themselves. We have been asked to wash our hands often and correctly. We have also been urged to stay socially distant from people outside our own household. And one of the most important precautions, of course, is to wear a face mask. But as the pandemic continues, some people are now asking: Can wearing two masks provide more protection against the virus? The quick answer is: It depends. Some health experts say it is possible that doubling up the masks could help in some situations. One of those experts is Dr. David Hamer. He is an infectious disease expert at Boston University. Wearing just one mask should be enough for most situations, Hamer told The Associated Press. But the mask needs to fit well, he adds, and not be loose. The U.S. Centers for Disease Control and Prevention (CDC) recommends wearing a cloth mask made from two or more layers. The mask, the health agency adds, needs to cover both the nose and mouth. And it should fit snugly on the face.