The highest CO2 ppm reading on a Southwest flight this afternoon from Boston to Nashville (just after leaving the departure gate). #covid #COVID19 #CovidIsNotOver #COVIDisAirborne #travel #airquality 😷 https://files.mastodon.social/media_attachments/files/111/155/632/276/709/590/original/799d1b8767ebc8ee.png