An airport is a busy place. Atlanta's Hartsfield-Jackson International Airport had 104 million passengers pass through its doors in 2016. That means more than a quarter-million people move through the airport every day. They sit in the chairs, touch bins at security, grab straws, and put straws back when they accidentally grab two.
Insurancequotes.com sent teams to swab six surfaces at three major US airports and on three flights to take a look at the average number of colony-forming units (viable bacteria and fungal cells per square inch) living on various surfaces.
The sample isn't huge, so there are questions about how close the numbers are to a true average. You probably don't need to scrub your entire body with pumice and disinfectant. But it does give a sense of what is happening at some airports and what may be happening at others.