Skip to content
My WebMD Sign In, Sign Up

Cold, Flu, & Cough Health Center

Font Size

Planes, Trains, and …Germs?

Travel Health Risks You Can -- and Can't - Avoid
By
WebMD Feature

Wherever you go, however you get there, you always have traveling companions -- germs.

Will these fellow travelers make you sick? That depends partly on luck, experts say. But you can do a lot to protect yourself.

Recommended Related to Cold & Flu

H1N1 Swine Flu Vaccine FAQ

A safe and effective H1N1 swine flu vaccine was created and produced in record time -- but it still wasn't ready when the U.S. pandemic peaked in early fall of 2009. Even so, by mid-December 2009, 28 million adults (13% of U.S. adults) and 18 million children (24% of U.S. children) had received the vaccine. When seasonal flu vaccination begins for the 2010-2011 flu season, the regular flu vaccine will contain the 2009 H1N1 swine flu vaccine (as well as vaccines against the older H3N2 type A and...

Read the H1N1 Swine Flu Vaccine FAQ article > >

The modes of transportation most often blamed for spreading disease are airplanes, cruise ships, and subway trains. Are they just scapegoats? Or are these popular conveyances really making us ill? WebMD asked experts who've studied transportation health.

Up in the Air, Germs Are There

The Ides of March, 2003, was unlucky indeed for the 120 travelers who that day boarded Air China flight 112. The Boeing 737-300 completed its three-hour flight from Hong Kong to Beijing without apparent incident. But coughing in seat 14E -- a middle seat near the center of the plane -- was a person carrying the deadly SARS virus.

Within eight days, 20 passengers and two flight attendants would come down with SARS. Some of those who became infected were sitting as far as seven rows away from the man carrying the SARS virus. Five would die.

It's not just SARS - and it's not just China. In 1979 a commercial airliner sat on the tarmac for three hours with its ventilation system shut down. Someone on board had the flu -- and, within three days, so did nearly three-fourths of the plane's passengers.

SARS and influenza, of course, are only two of the multitude of bugs lurking out there. But the case of Flight 112 suggests that the current understanding of the spread of airborne disease aboard aircraft, which is based on tuberculosis investigations, may be outdated. Emergency medicine specialist Mark A. Gendreau, MD, senior staff physician at Lahey Clinic Medical Center, Burlington, Mass., recently reviewed what is and isn't known about infectious disease spread during air travel.

"The CDC and World Health Organization say you risk getting an infection only if you are sitting within two rows of someone who has something - and only if you are sitting there for more than eight hours," Gendreau tells WebMD. "But Flight 112 was only three hours long, and people sitting as far as seven rows back were affected. So that says, 'Wait a minute folks.' That old advice may have worked for tuberculosis, but what about SARS and other infectious diseases? More study into that is needed."

There's a lot we don't know, agrees Roy L. DeHart, MD, MPH, senior consultant in occupational and aviation medicine at Vanderbilt University, Nashville, Tenn. And if anyone understands the various health risks of flying, it's DeHart. He capped his 23-year Air Force career as commander of the USAF School of Aerospace Medicine. Former director of occupational and environmental Medicine at the University of Oklahoma, he's an FAA-certified senior aviation medical examiner.

"We don't know what that passenger next to you is contributing to the air stream as he is inhaling and exhaling," DeHart tells WebMD. "With flights coming out of developing countries where prevention programs are not as strong as they might be, it is not unusual that a person may have a problem like tuberculosis. It spreads. Usually just to two or three people, but if a patient is found on board, health authorities have a tough job trying to track those people down. It can be a horrendous problem. There can be hundreds of patients spreading whatever, wherever. Major spread is possible. So, yes, there can be problems."

Today on WebMD

neti pot
Slideshow
Chicken soup
Slideshow
 
Natural Cold Flu Remedies Slideshow
Slideshow
Syringes and graph illustration
TOOL
 
Natural Cold Flu Remedies Slideshow
Slideshow
blowing nose
VIDEO
 
Allergy And Sinus Symptom Evaluator
Health Check
Boy holding ear
Article
 
woman receiving vaccine shot
Article
Bacterial or Viral Infection
Video
 
How To Calm Your Cough
Quiz
Sore Throat
Slideshow
 

WebMD Special Sections