A Broward County, Fla., employee takes water samples in a yard to test for mosquito larvae in June. It's part of the county's mosquito control program. Lynne Sladky/AP hide caption

toggle caption Lynne Sladky/AP

The Centers for Disease Control and Prevention is updating its guidelines on preventing transmission of Zika virus via sexual activity. Stephanie Lynn/Flickr Flash/Getty Images hide caption

toggle caption Stephanie Lynn/Flickr Flash/Getty Images
Vidhya Nagarajan for NPR

Sick? People Say They Still Go To Work, Even When They Shouldn't

  • Download
  • <iframe src="https://www.npr.org/player/embed/482799063/485593556" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Aedes aegypti mosquitoes, which have been known to carry the Zika virus, buzz in a laboratory in Cucuta, Colombia. Ricardo Mazalan/AP hide caption

toggle caption Ricardo Mazalan/AP

'Nobody Is Immune': Bracing For Zika's First Summer In The U.S.

  • Download
  • <iframe src="https://www.npr.org/player/embed/483774367/483873468" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

A silver-haired bat, the type that transmitted rabies to a woman in Wyoming after apparently biting her while she slept. Lyn Alweis/Denver Post via Getty Images hide caption

toggle caption Lyn Alweis/Denver Post via Getty Images

Aedes aegypti mosquito photographed through a microscope. Felipe Dana/AP hide caption

toggle caption Felipe Dana/AP

CDC: 157 Pregnant Women In The U.S. Have Tested Positive For Zika

  • Download
  • <iframe src="https://www.npr.org/player/embed/478835112/478886195" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

In some parts of the country, this might require bug spray. Steven Errico/Getty Images hide caption

toggle caption Steven Errico/Getty Images

Who Should Be Worried About Zika And What Should They Do?

  • Download
  • <iframe src="https://www.npr.org/player/embed/478251289/478337188" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Kelli Glenn holds a photo of her father while he was in the hospital. Meredith Rizzo/NPR hide caption

toggle caption Meredith Rizzo/NPR

Suddenly Paralyzed, 2 Men Struggle To Recover From Guillain-Barre

  • Download
  • <iframe src="https://www.npr.org/player/embed/476494277/478188388" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

More than 20,000 babies in the U.S. were born with congenital rubella syndrome during an outbreak of rubella in 1964-65. A vaccine developed in 1969 helped curb the virus's spread but hasn't eliminated it worldwide. Public Health Image Library/CDC hide caption

toggle caption Public Health Image Library/CDC

Lessons From Rubella Suggest Zika's Impact Could Linger

  • Download
  • <iframe src="https://www.npr.org/player/embed/470683695/471474848" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Standing water and abandoned tires make Houston's Fifth Ward hospitable for mosquitoes. Courtesy of Anna Grove Photography hide caption

toggle caption Courtesy of Anna Grove Photography

Houston Prepares Now For Zika's Potential Arrival This Summer

  • Download
  • <iframe src="https://www.npr.org/player/embed/470683503/471316398" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript