Zika Virus: Information for States and Territories

At a Glance – Zika in the U.S. (updated 1/11/17*)

U.S. States
Travel-associated Zika virus disease cases reported: 4,649
Locally acquired vector-borne cases reported: 216
Laboratory acquired cases reported:
Pregnant Women with Any Lab Evidence of Zika Virus Infection: 1,292
Liveborn infants with birth defects: 36
Pregnancy losses with birth defects: 5

Of the 4,866 cases reported, 38 were sexually transmitted and 13 had Guillain-Barré syndrome.

U.S. Territories
Travel-associated cases reported: 135
Locally acquired cases reported: 35,280
Pregnant Women with Any Lab Evidence of Zika Virus Infection: 2,842 

Of the 35,415 cases reported, 50 had Guillain-Barré syndrome.

*Visit CDC.gov for the most up to date information.


New from ASTHO: Top Questions on Zika: Simple Answers


Zika virus is a mosquito-borne flavivirus transmitted to humans primarily by the Aedes aegypti mosquitoes, the same mosquitoes that transmit dengue, yellow fever, and chikungunya viruses. CDC estimates that 80 percent of Zika cases are asymptomatic. Symptomatic cases usually result in mild illness and symptoms such as acute onset of fever, rash, joint pain, and conjunctivitis. Some evidence suggests severe outcomes such as Guillian-Barre syndrome and microcephaly in infants via maternal-fetal transmission of Zika virus. There is currently no vaccine to prevent or medicine to treat Zika virus. For more information on Zika virus in the United States see CDC's Zika Virus web page: www.cdc.gov/Zika.


ASTHO staff have compiled the following links to selected resources and background materials that were created by state and territorial health departments and national and international sources for use by state health agency leaders. We'll add to these materials periodically.

What's New

New Virtual Training on Vector Control for Environmental Health Professionals Now Available

CDC's National Center for Environmental Health and Tulane University School of Public Health and Tropical Medicine announce a new virtual training on using integrated pest management to control vectors that spread pathogens, including Zika virus. Vector Control for Environmental Health Professionals (VCEHP) training will provide participants with the latest science and evidence from vector control experts and allow them to access concrete principles, practices, and resources for vector control. Continuing education units are available through the National Environmental Health Association. Registration is free and the training is available to complete at any time. More information about the course topics is available on the website.

Authorization of Emergency Use of an In Vitro Diagnostic Device for Detection of Zika Virus

The Food and Drug Administration is announcing the issuance of an Emergency Use Authorization for an in vitro diagnostic device for detection of the Zika virus in response to the Zika virus outbreak in the Americas. (Federal Register, 1/9/17)

Florida Announces Three Locally Acquired Cases of Zika

On December 28, Florida officials reported three new locally acquired cases of Zika in Miami-Dade County. Even with these new cases, Florida does not have any areas identified as having active Zika transmission. Investigations are underway to determine the source of exposure.



This information page was developed by ASTHO to help state and territorial health officials and state health agencies stay abreast of a developing public health concern in the form of background information, pertinent materials, and ongoing updates. ASTHO staff will continue to monitor this situation. Health agencies may contact infocenter@astho.org with questions regarding this topic.