Screening at Point of Entry

• Screening is a strategy used in a population to identify an unrecognized disease in individuals without signs or symptoms that needs immediate isolation and investigation (from massive population)
• Screening measures can be adapted for airports, ports and ground crossings
• Exit or entry screening usually involves two steps. 
• Step One: Primary Screening: Primary screening identifies travellers who may be symptomatic with or were possibly exposed to a case of the illness of concern
• Step Two: Secondary Screening: Travellers who have been referred for secondary screening should undergo an in-depth interview conducted by a public health or medical professional