January 14, 2016 6:01 AM EST

The Centers for Disease Control and Prevention has confirmed the first recent case in the continental U.S. of the Zika virus–which has been linked to serious birth defects in infected pregnant women–in Houston. Here’s what to know.

ORIGIN

The latest batch of cases were detected in Latin America; it’s primarily spread by infected mosquitoes.

SYMPTOMS

People can develop a fever, a rash and red eyes, as well as muscle pain, headaches and nausea.

PREVENTION

Using insect repellent can protect against mosquito bites.

LONG-TERM RISK

For most people, it’s very low: only about 1 in 5 people who are infected actually get sick, and symptoms typically clear up within a week with rest and fluids.

–Alice Park

This appears in the January 25, 2016 issue of TIME.

Contact us at letters@time.com.

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