WHO recommends that government and point of entry authorities in affected areas establish a system in collaboration with aircraft and other conveyance operators so that passengers departing for international destinations from an affected area are interviewed, preferably by a health care worker, in the port of departure before check-in. The interview should assess whether the passenger: currently has or has experienced in the past 48 hours any symptoms of SARS (http://www. who. int/csr/sars/casedefinition/en/) and has had any contact with suspect or probable SARS cases; has a fever (body temperature may be checked if appropriate).