Editor’s note: This post has been updated with new information. Almost a year into the COVID-19 pandemic, infections are still skyrocketing. With air passenger traffic at 34% of what it was pre-pandemic, and travelers hungry to get back on the road and into the skies, the scramble to find a solution is on. For more TPG news delivered each morning to your inbox, sign up for our daily newsletter. Vaccines have arrived, but mass production and broad availability could still be months away. As the industry continues to explore ways to jumpstart travel, some airports and airlines have a potential...