This 2002 edition has been completely redesigned to refelect better knowledge about the risks to which travellers are exposed and the precautions needed to protect their health. With new material and a revised organizational structure， the text offers guidance on the full range of health risks likely to be encountered at specific destinations and associated with different types of travel - from business， humanitarian and leisure travel to backpacking and adventure tours. Information is intended to help the the medical profession be fully alert to potential risks and provide appropriate advice， whether concerning recommended vaccinations， protection against insects and other disease vectors， or safety in different environmental settings. Details range from simple strategies for reducing the effects of jet lag， through factors that influence the effectiveness of mosquito nets， to advice on when and how to treat diarrhoea. Throughout， emphasis is placed on the responsibility of travellers to ask for information， to be aware of risks and to take on the necessary precautions before， during and after travel. As far as possible， information on specific health risks， including those linked to infectious diseases， is presented in a form readily accessible to interested travellers and non-medical readers. The practical value of this material is enhanced through the inclusion of numerous， maps， tables， checklists and explicit warnings. In line with the needs of contemporary travellers， this edition includes a new chapter in the health aspects of air travel， especailly long haul flights， and more extensive information on environmental health risks， such as those associated with food or recreational waters. Information on infectious diseases of potential risk for travellers has also been expanded. Over 30 diseases are profiled in terms of their causative agent， mode of transmission， clinical features， geographical distribution， risks for travellers and prophylactic and preventive measures. Additional chapters describe vaccine-preventable diseases， vaccines for routine and selective use and selection criteria， and offer detailed guidance on malaria， the most important infectious disease threat for travellers. This text concludes with the traditional country-by-country list of required vaccinations， together with pertinent information on the malaria situation， for every country or territory in the world.