From January 2021 to June 2022, CDC required pre-departure SARS-CoV-2
testing for all air passengers arriving into the United States. Using
data collected during a pilot surveillance program, this manuscript
describes pre-departure testing behavior among a convenience sample of
international air passengers entering the United States from July to
September 2021 at six US ports of entry. We analyzed pairwise
relationships between self-reported test type, test timing, demographic
and travel characteristics, and COVID-19 vaccination status. We found
that test type was significantly associated with departure region,
likely reflecting the regional disparities in the availability of tests
at the time of the activity.