Zika primarily spreads through infected mosquitoes. You can also get Zika through sex without a condom with someone infected by Zika, even if that person does not show symptoms of Zika.
CDC recommends special precautions for pregnant women.
Pregnant Women Should Not Travel to an Area with Risk of Zika
Pregnant women should not travel to areas with risk of Zika (i.e., with documented or likely Zika virus transmission).
Pregnant women should consider postponing travel to yellow cautionary areas in the United States. For information on domestic travel, see CDC’s guidance.
What to Do If You Live In or Travel to an Area with Risk of Zika
If you live in or must travel to one of these areas, talk to your doctor or other healthcare provider first and strictly follow steps to prevent mosquito bites and practice safe sex.
During travel or while living in an area with risk of Zika
Take steps to prevent getting Zika through sex by using condoms from start to finish every time you have sex (oral, vaginal, or anal) or by not having sex during your entire pregnancy.
After travel
Talk to a doctor or other healthcare provider after travel to an area with risk of Zika.
If you develop a fever with a rash, headache, joint pain, red eyes, or muscle pain talk to your doctor immediately and tell him or her about your travel.
Take steps to prevent mosquito bites for 3 weeks after returning.
Take steps to prevent passing Zika through sex by using condoms from start to finish every time you have sex (oral, vaginal, or anal) or by not having sex.
Traveled to an area with risk of Zika or had sex with a partner who lived in or traveled to one of these areas
You should be tested if you have symptoms of Zika or if an ultrasound shows that your fetus has abnormalities that might be related to Zika infection.
Routine testing is not recommended for pregnant women exposed to these areas who do not have symptoms. However, your doctor may offer testing based on your individual situation.
Live in or frequently travel (daily or weekly) to an area with risk of Zika
If you have symptoms of Zika at any time during your pregnancy, you should be tested for Zika.
If you do not have symptoms, you should be offered testing at your first prenatal care visit, followed by two additional rounds of testing at regular prenatal care visits during your pregnancy.