In today's global community, with people shuttling to and fro across the world, it is increasingly hard to prevent the spread of infectious diseases. This is particularly true of diseases that are unfamiliar to the medical community because they are new or because they are making a comeback after a long absence.
如今交通發達、人類往來密切，世界宛若地球村，傳染病的預防更加困難，特別是人們尚陌生的新興傳染病及早已淡忘的再現傳染病。