Humanitarian emergencies caused by conflict
or natural disasters, are frequently characterized by the displacement
of large numbers of people, with severe disruption of basic infrastructure,
resulting in overcrowding, increased exposure to disease vectors, food
insecurity, and lack of access to safe water, sanitation, and basic health
services. In populations affected by humanitarian emergencies, the risk
of communicable diseases is greatly increased, with particularly high morbidity
and mortality from communicable diseases in acute conflict situations.