Your risk of catching flu will increase if you are in crowded places such as pilgrimages, festivals, cruises; or travelling through airports and other busy transport hubs. The risk of flu infection is reduced by: practicing good respiratory and hand hygiene. receiving the flu vaccine.
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From flu-like symptoms to digestive tract upsets, feeling ill post-vacation affects up to 80 percent of returning travelers, says Dr. Ashima Oza, a primary care physician and an instructor in the Division of Medicine at Weill Cornell Medicine.
Air travelAirplanes can be breeding grounds for bacteria and viruses, from cramped conditions to the low humidity that characterizes the air circulating on board. Low humidity can dry out your nasal passages and irritate your throat.
Jet lag symptoms usually occur within a day or two after traveling across at least two time zones. Symptoms are likely to be worse or last longer the farther you travel. This is especially true if you fly east. It usually takes about a day to recover for each time zone crossed.