A review in the medical Lancet found the commonest diseases linked to air travel have been spread via contaminated food rather than from the cabin’s recycled air. The US researchers found a total of 41 in-flight outbreaks of food poisoning resulting in 11 deaths had been documented between 1947 and 1999. Salmonella was the most commonly reported infection spread by a commercial airline, with 15 recorded outbreaks between 1947 and 1999, affecting nearly 4,000 passengers and killing seven. The US authors stressed that no food- or water-borne outbreaks had been reported in the past five years probably because of greater use of pre-packaged frozen meals, and improved food handling and inspection.