From The Philadelphia Inquirer
By Jonathan Lai
Call it the naked rule: If you have to put clothes on, you should put on a mask.
Really, what it means is you should cover your nose and mouth when you might come into contact with people who don’t live with you. That’s not just when you’re going to a specific place where people are congregating, such as a store.
And for people who live in apartments or other multi-home buildings, it means wearing a mask when going to common areas where you might run into others.
So even if you don’t leave the building itself, or feel like you’re going anywhere — just downstairs to throw out the trash! — you should put a mask on when leaving your apartment. It’s about your possible exposure to neighbors, and lack of control over that.