Most Zika infections are mild or completely asymptomatic — roughly 80% of people never know they were infected. However, Zika poses a serious risk during pregnancy: the virus can cross the placental barrier and cause microcephaly and other severe birth defects.
Zika is transmitted by the same Aedes mosquitoes that carry dengue and chikungunya, making it a day-biting risk in tropical urban areas. The virus can also be sexually transmitted, which extends risk beyond the travel period itself.
There is no vaccine or specific treatment for Zika. Pregnant women and those planning pregnancy should avoid travel to active outbreak areas. All travelers should maintain bite precautions for 3-6 months after returning from endemic regions.
Aedes aegypti (primary) and Aedes albopictus — day-biting species. Also transmitted sexually.
Pregnant women and those planning pregnancy are the primary concern. The virus can cause devastating birth defects including microcephaly. Most adults recover without issues within a week.
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Disease information is sourced from WHO, CDC, ECDC, and OpenDengue. This is not medical advice — consult a healthcare professional for diagnosis and treatment.