It was interesting on our journey to see where people masked, and who masked. The T has a recording on repeat telling people they're required to wear a mask on the platforms and in the trains, and I'd say 85 percent of people did. But then there's that other 15 percent.

The exhibit was almost open air (it was in a long, straight, open space that was open to the outdoors on both ends), and most people were unmasked in it--but almost everyone put a mask on to go into the bathrooms.