WBUR spoke to several experts to learn more about the science behind one-way masking, and how to test your own mask at home. The Science Behind One-Way Masking Masks are most powerful in a group ...

Is "one-way masking," or wearing a mask when no one else is, effective in protecting you from getting the virus that causes COVID-19? Here is what you need to know. (AP Photo/Evan Vucci).