Zika
Zika is a viral infection mainly spread by mosquitoes. Many people have no symptoms, and illness is usually mild when symptoms occur. Infection during pregnancy can nevertheless seriously harm the developing baby, including the brain and eyes. Rare neurological complications can also occur in adults. Mild illness does not mean pregnancy-related risk is absent.
Prevention: Behavior
Symptoms
- Mild fever and a skin rash
- Joint or muscle pain
- Red eyes and headache
- Often no noticeable symptoms
Transmission
- Bites from infected Aedes mosquitoes
- Sexual contact with an infected person
- From an infected pregnant person to the developing baby
Prevention
Avoid mosquito bites during the day and night. After possible exposure, condoms or avoiding sex help prevent sexual transmission. People who are pregnant, planning pregnancy, or have a pregnant partner should discuss current travel and prevention advice with a healthcare professional.
Where it occurs
Zika occurs in tropical and subtropical regions. Current local risk can be uncertain, so consult up-to-date travel guidance.
Diagnosis and care
Treatment is supportive; there is no specific antiviral treatment. Symptoms can resemble dengue and other infections, so medical assessment may be needed.
Source
- Zika
Based on CDC information
Source language: English
Source reviewed: April 23, 2025
Source accessed: May 17, 2026
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