Mass travel and health problems (with particular reference to Asia and the Pacific Region).
D000401:Aircraft; D001208:Asia; D003140:Communicable Disease Control; D005506:Food Contamination; D006801:Humans; D007300:Insect Control; D011634:Public Health; D014195:Travel; D014611:Vaccination; D014867:Water; D014944:World Health Organization
D014867:Water