Table 1. False positive reactions obtained with any of the four DENV ICB ELISAs and with IIF.

Serum donors	Number	ICB ELISA	ICB ELISA + iTBEP	Dengue IIF
DENV negative controls	88	5	0	0
WN patients	12	0	0	12
TBEV vaccinees	20	0	0	7
JEV vaccinees	5	0	0	3
YFV vaccinees	11	0	0	4
Total	136	5	0	26

∶>10. ICB ELISA positive: P/N. 136 serum samples without antibody to DENV were compared. In the absence of competitive iTBEP antigen the ICB ELISA produced 5 false positive results. IIF positive: 1