But passengers taking the shots won't be protected right away. Those vaccinated develop some immunity to the flu virus after three or four days. It takes about two weeks for a flu shot to offer full protection.
Being vaccinated now offers plenty of time for the shot to fully take effect before the peak flu season begins in the U.S., typically after December, Zampella said.
Danny Manzon of Jacksonville, Fla. wanted to get a flu shot for three months but the busy restaurant consultant never had the time to get vaccinated. So he jumped at the chance to get one from a kiosk near his airline gate at the Atlanta airport.
''The convenience is great,'' Manzon, 53, said after getting a flu shot on Tuesday from The AeroClinic kiosk, located in front of an AirTran Airways gate in Concourse C.
Ultimately, airport health clinics may offer more than flu shots to busy passengers near gates. Health officials say they're considering other kiosk-based services in the future, including more vaccinations and tests for high blood pressure or cholesterol.
''We're finding that's where people are,'' said Michelle Smith, spokeswoman for Denver Health, which operates the Medical Clinic at DIA, or Denver International Airport. ''Especially if you're in an airport where a large percentage of our travelers are there for connecting flights, you want to be able to offer that convenience.''
The Atlanta airport clinic is considering offering pneumococcal vaccine once the flu season ends, based on requests from travelers approaching the kiosks. It also may offer blood pressure and cholesterol tests at the kiosks in the future, Mack said. The Denver clinic wants to offer similar services and may also address altitude sickness, Smith said.
Last year, Chicago's O'Hare International Airport offered about 5,000 flu shots to airport passengers and employees from kiosks next to gates.
''We didn't know if it was going to be successful. It went over great and we asked the (Chicago) Department of Aviation this year to do kiosks full-time'' at O'Hare and Chicago Midway Airport, said Dr. John Zautcke, medical director for the University of Illinois Medical Center at O'Hare. ''Business travelers love it. They are just thanking us.''
Dr. Nathaniel Hupert, assistant professor of public health and medicine at the Weill Medical College of Cornell University in New York, says the gate vaccination programs make sense as a public health measure.
''Anything that makes flu shots more accessible is a good thing,'' said Hupert, who has no connection to the flu shot clinics. ''It's always helpful during normal times to try out new mechanisms (to distribute vaccine). This idea of offering vaccine in airports is actually an interesting and helpful step.''