Which of the following is good advice for air travellers?
Deep vein thrombosis is thought to be more likely on flights lasting more than 4 hours
For most people, 'jet lag' due to disturbance of the circadian sleep rhythm is more common after travel eastward
Recirculated cabin air is the main cause of transmission of infections during flights
Consumption of alcohol can increase the likelihood of 'air rage'
Adequate fluid intake is important especially during long flight
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