Several people in the UK have been diagnosed with the mosquito-borne Zika virus.
The current Zika outbreak began in Brazil in May 2015.
Most people who are infected with the virus don't show any symptoms.
For the approximately 1 in 5 who do, symptoms usually last from a few days to a week and are mild, possibly including a fever, rash, conjunctivitis, muscle pain, headache, or pain behind the eyes.
Zika virus is spread mostly by the female aedes mosquito.
There is currently no antiviral treatment for Zika, and there's no vaccine or drug that can prevent the infection.
Zika gets its name from the Zika forest in Uganda, where it was first isolated in 1947.
Kelly Oakes is science editor for BuzzFeed and is based in London.
Contact Kelly Oakes at email@example.com.
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