Zika virus

Also called Zika or Zika fever

Zika virus is spread mainly by mosquito bites in some parts of the world, including areas of South and Central America, the Caribbean, Africa, Asia and the Pacific. It can also be passed on through sex. Most people have no symptoms or only a mild illness. Infection in pregnancy can cause serious birth defects, such as an unusually small head (microcephaly).

Last updated Nov 9, 2026

What it is

There is no specific treatment or vaccine. Rest, fluids and paracetamol help, and symptoms usually pass within a week.

People who are pregnant or planning a pregnancy should get advice before travelling to affected areas, and use condoms for a time after travel.

Common signs

  • A rash
  • Itching
  • A mild fever
  • Headache
  • Red eyes
  • Joint or muscle pain

How it is usually diagnosed

  • Questions about recent travel
  • Blood or urine tests
  • Ultrasound scans in pregnancy

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Blood and urine test results
  • Travel clinic notes
  • Pregnancy scan reports
  • Obstetric letters

Questions to ask your doctor

  • Is it safe for me to travel there?
  • How long should I wait before trying for a baby?
  • Does my pregnancy need extra scans?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A high temperature after travel to an affected area: get urgent help the same day and mention your travel
  • Weakness or tingling in the arms or legs, or difficulty breathing: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources