Proportion of shigellosis and rubella identified by epidemiologic investigation before and after the application of AEIS.

aTest for trend by Cochran-Armitage: The proportion (%) that was identified by epidemiologic investigation before and after AEIS; asymptomatic cases (%) that were identified by epidemiologic investigation before and after AEIS implementation.bProportion of active case finding was calculated from the number of cases identified by epidemiologic investigation divided by the sum of cases identified by epidemiologic investigation and cases reported by a physician.cProportion of asymptomatic cases identified by epidemiologic investigation was the number of asymptomatic cases identified by epidemiologic investigation divided by the total number of cases identified by epidemiologic investigation.