Mapping the cryptic spread of the 2015–2016 global Zika virus epidemic

Table 2 Susceptible spatial units with a high chance of cryptic ZIKV spread during 2015–2016 (refer to Additional File 8: Table S3 for the list of first-level country subdivisions belonging to each susceptible spatial unit)

Country	Spatial unit name	Estimated probability (\( \overline{\theta} \)) that no onward spread of ZIKV had occurred during 2015–2016	Evidence of historical ZIKV circulation prior to 2015 (Y/N)
Angola	Luanda*	< 0.0001	Y [51]
Indonesia	Banten*	< 0.0001	Y [52]
India	Maharashtra*	< 0.0001	Y [53]
Nigeria	Lagos*	< 0.0001	Y [54]
China	Taiwan*	< 0.0001	N
China	Guangdong*	< 0.0001	N
India	Karnataka	0.0002	N
India	Tamil Nadu	0.0003	Y [53]
India	Delhi	0.0004	N
USA	Hawaii	0.0004	N
Senegal	Dakar*	0.0004	Y [55]
Uruguay	Canelones	0.0004	N
Réunion	Réunion	0.0004	N
Australia	Queensland	0.0005	N
Indonesia	Bali	0.0007	N
Mozambique	Maputo*	0.0007	Y [56]
Ghana	Greater Accra	0.0018	N
Congo DRC	Kinshasa*	0.0019	N
India	Kerala	0.0050	N
Saudi Arabia	Makkah	0.0115	N
India	Goa	0.0130	N
India	Telangana	0.0190	Y [53]
Congo	Pool*	0.0281	N
Côte d’Ivoire	Abidjan	0.0470	N^§

*\( \overline{\theta} \) remained lower than 0.05 even within the highly conservative scenario
^§There was evidence of historical ZIKV circulation prior to 2015 in Côte d’Ivoire, but it was not clear whether any of the positive serum samples were collected from the Abidjan spatial unit or not

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