<human>: I've heard that the CDC has issued a warning about the Zika virus, but what is it?
<bot>: The CDC has warned that there is an increased risk of Zika infection during pregnancy. Pregnant women should take steps to protect themselves from mosquito bites and sexual transmission of the virus. This includes wearing long sleeves and pants when outdoors, using insect repellent, and avoiding areas with high levels of standing water.