Is Zika contagious? How does it spread?

Most people who are infected were bitten by an infected mosquito. There has been one report of the possible spread of the virus through blood transfusion and a few reports of sexual transmission.

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1. Is Zika contagious? How does it spread?
2. What is the incubation period for Zika?
3. Who is at highest risk for getting infected with Zika?
4. Are you immune for life once infected?
5. Can mothers pass Zika on to babies?
6. Can Zika be spread during breastfeeding?
7. Can Zika be sexually transmitted?
8. Is CDC going to release recommendations about the sexual transmission of Zika virus?
9. Can a previous Zika virus infection cause someone who later becomes pregnant to have an infant with microcephaly?
10. If a woman who is not pregnant is bitten by a mosquito and infected with Zika virus, will her future pregnancies be at risk?