Original, empirically derived expansion factors for countries in Southeast Asia.

aCambodia reports only inpatients <16 years.
bRatio is number of number of dengue cases reported from outpatient (OP) clinics divided by the number from inpatient (IP) or hospitalized settings.
cThe study did not include all study villages and urban areas for the entire period.
dEFs were obtained using the weighted averages, based on reported episodes from cohort by year.
Notation: DHF denotes dengue hemorrhagic fever; DSS denotes dengue shock syndrome.