Zika Virus (pronounced Zee-Ka) is:

  • A virus that is spread through mosquito bites - the same Aedes mosquitoes that can spread dengue and chikungunya.
  • A risk to anyone traveling to a region where Zika virus is found.

Signs & Symptoms

Approximately 1 in 5 people infected with Zika virus will become ill. Symptoms usually begin within a few days to two weeks after being bitten by an infected mosquito.

The principal symptoms are:
  • Conjunctivitis (red eyes)
  • Fever
  • Joint pain
  • Rash
Other less common symptoms may include:
  • Headache
  • Muscle pain
  • Pain behind the eyes
  • Vomiting


Zika virus infection during pregnancy may lead to birth defects such as microcephaly (smaller than normal head size in infants due to incomplete brain development).