engage in, so there's no need to wonder about it...btw, there's a simple chart in there that you can print out and put on your refrigerator for all to see. Once you've studied it carefully, you'll notice that the Bidens and Carters were acting in accordance (inside), but a bit overly cautious outside...but hey, where's the harm?
If you want even more detail on the importance of mask wearing...especially inside...check out the MIT Report that Baron was kind enough to provide us with. Frankly, I'm surprised that after posting it he hasn't come down hard on all 'mask-deniers'...go figure.