Why is the Asia-Pacific region at high risk for Zika spread?

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The Asia-Pacific faces a high risk of Zika virus transmission due to a combination of environmental factors, a significant mosquito population, and extensive international travel.

The Asia-Pacific region is at a considerable risk for the further spread of the Zika virus. Hundreds of cases have already been reported in countries such as Singapore and Thailand, with concerning outcomes like two infants diagnosed with microcephaly linked to Zika infections. The World Health Organisation (WHO) has identified at least 19 countries within the Asia-Pacific that have detected the virus, and anticipates continued new case reports and potential outbreaks.
Favorable Environmental Conditions and Vector Presence

The region's tropical climate provides ideal breeding conditions for the Aedes Aegypti mosquito, the primary vector for Zika transmission. This mosquito species, also known to transmit dengue fever, thrives in warm, humid environments prevalent across much of the Asia-Pacific. The consistent presence of these mosquitoes means that the virus has a ready means of transmission to human populations.
High Incidence of Human Cases and International Travel

Significant numbers of Zika infections have already been documented across the region, with Singapore alone reporting over 400 cases. Vietnam, the Philippines, and Malaysia have also confirmed Zika infections among their populations. This existing burden of disease, coupled with the high volume of international travelers moving through the Asia-Pacific, exacerbates the risk of both localized spread and the introduction of the virus into new areas.
Challenges in Virus Control and Lack of Specific Treatments

Controlling the spread of Zika is made more challenging by the region's demographic and travel patterns. Furthermore, the lack of a specific vaccine or targeted medical treatment for Zika leaves populations vulnerable once infected. While Zika typically presents with mild symptoms like fever, sore eyes, and rash, the severe risk it poses to pregnant women, potentially leading to microcephaly in newborns, underscores the urgency of prevention and control efforts.

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Why is the Asia-Pacific region at high risk for Zika spread?

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