Reduced airplane travel in the wake of 9/11 attacks has been found to have led to a delay in the 2001-2002 flu season, according to research conducted in the U.S. This confirms the oft-quoted theory that air travel will aid in the spread a bird flu pandemic.
John Brownstein of the Children's Hospital Informatics Program at the Harvard-MIT Health Sciences and Technology program, who led the study said for the first time researchers have been able to show, using real data, that air travel spreads the flu, suggesting that reducing the number of air passengers could possibly thwart a flu pandemic.
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