Table 1.

Laboratory characteristics and incidences of EV-A71, CV-A6, and CV-A16 infection among household contacts of index cases (n = 545).

Variables	EV-A71	CV-A6	CV-A16
Seropositive	424	504	529
Infection	40	106	36
RT-PCR	02	06	0
RT-PCR and seroconversion	01	05	0
Seroconversion	40	106	36
EV-A71 NT against	—	09	17
CV-A6 NT against	09	—	18
CV-A16 NT against	17	18	—
Number of household contacts among households with an index case of each serotype	84	336	109
Incidence rate	47.6% (40/84)	31.5% (106/336)	33.0% (36/109)