Table 3. Key characteristics of the couples (n = 36) for which sexual transmission of ZIKV was suspected.

Characteristic	n (%)	References
Direction of transmission
Male–female	34 (94%)	[6,78,79,82,84,87,88,90,91,100,102,105,113,115,119–121,123,124,127,131,137]
Female–male	1 (3%)	[96]
Male–male	1 (3%)	[85]
Symptomatic status
Symptomatic	27 (75%)	[6,78,79,82,84,85,88,90,96,102,113,115,121,124,127,131,137]
Asymptomatic	2 (6%)	[91,100]
Not reported	7 (19%)	[87,105,119–121,123]
Secondary infected individual had also travelled to endemic area
Yes	5 (14%)	[88,91,115,124,137]
No	31 (86%)	[6,78,79,82,84,85,87,90,96,100,102,105,113,119–121,123,127,131]
Serial interval reported
Yes	15 (42%)	[6,78,79,84,85,88,90,96,102,115,124,131,137]
No	21 (58%)	[82,87,91,100,105,113,119–121,123,127]
Diagnostic certainty for primary infected individual
Confirmed with RT-PCR	14 (39%)	[84,85,88,90,91,96,102,115,120,121,124,127,131,137]
Confirmed with serology	4 (11%)	[6,78,79,119]
Suspected	3 (8%)	[79,100]
Not reported	15 (42%)	[82,87,105,113,121,123]
Diagnostic certainty for secondary infected individual
Confirmed with RT-PCR	18 (50%)	[79,84,85,88,90,91,96,100,102,115,120,121,124,127,131,137]
Confirmed with serology	4 (11%)	[6,78,79,119]
Suspected	0 (0%)	—
Not reported	14 (39%)	[82,87,105,113,123]

RT-PCR, reverse transcription PCR.