Zika Virus

Zika virus is spread to people primarily through the bite of an infected mosquito, but can also be transmitted through sexual interaction or from mother to child. The mosquitoes that can become infected with and spread Zika virus live in many parts of the world, including parts of the United States.

WHAT IS NEW?

  • In August 2018, the CDC updated its recommendation for men with possible Zika exposure to avoid conception and unprotected sex for at least three months after the beginning of illness or after last possible exposure (if no illness developed). The previous recommendation was for men with possible Zika exposure to avoid conception and unprotected sex for at least six months. See the full guidance here.
  • A new study from the CDC found that about one in seven babies born to mothers with possible Zika infection during pregnancy, who were at least one year old, had one or more health problems possibly caused by Zika. Some of these problems were not apparent at birth and were identified as the babies grew older.
  • Aedes albopictus, one species of mosquito that is capable of transmitting Zika, was found in Wisconsin in 2017. There is no evidence of Zika-infected mosquitoes or local transmission of Zika in Wisconsin. Wisconsin residents at risk for Zika virus infection are people who have traveled or had sexual contact with someone who traveled to locations with active Zika virus transmission.

Wisconsin Travel-Related Zika Virus
Updated October 31,
2018

  2016 2017 2018
Confirmed cases 63 9 0
Probable cases* 0 0 0
Undetermined flavivirus, confirmed 1 1 1
Total tested 1062 948 77

* Probable cases have presumptive positive laboratory results without confirmatory CDC testing.

Case numbers are updated monthly

 

 

 

 

 

Last Revised: October 31, 2018