Zika Virus: Information for States and Territories

At a Glance – Zika in the U.S. (updated 4/19/17*)

U.S. States
Travel-associated Zika virus disease cases reported: 4,939
Locally acquired vector-borne cases reported: 223
Laboratory acquired cases reported:
Pregnant Women with Any Lab Evidence of Zika Virus Infection: 1,762
Liveborn infants with birth defects: 58
Pregnancy losses with birth defects: 7

Of the 5,238 cases reported, 46 were sexually transmitted.

U.S. Territories
Total cases reported: 36,569
Travel-associated cases reported: 143
Locally acquired cases reported: 36,426
Pregnant Women with Any Lab Evidence of Zika Virus Infection: 3,592  

*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

CDC Co-Authors Report in JAMA: "Enhanced Epilepsy Surveillance and Awareness in the Age of Zika"
Recent studies show that seizures and epilepsy are being reported in some infants with congenital Zika virus infection, according to a commentary co-authored by CDC in JAMA Neurology. The effects Zika virus can have on a developing brain are similar to those of other congenital central nervous system infections associated with epilepsy. Seizure symptoms in infants and young children are difficult to recognize. This means that cases of Zika virus-associated epilepsy may be misdiagnosed or underreported. Caregivers’ and healthcare providers’ ability to recognize seizures and increase epilepsy monitoring and reporting is critical for early recognition and treatment. Better recognition, diagnosis, and reporting of seizures and epilepsy in infants and young children will help guide interventions to make sure families receive the right support and treatment.

In addition, an article written by two CDC scientists from CDC’s Division of Vector-borne Diseases entitled “A Decade of Arboviral Activity- Lessons Learned from the Trenches” was also published this week in the Public Library of Science – Neglected Tropical Diseases. The article highlights the many advances made in arbovirology over the past decade. In addition, the authors note the importance of strong state and national surveillance and preparedness systems for responding to emerging arboviral threats.

Sustaining the Zika Response in 2017 Webinar Series Materials Now Available Online
Presentation slides, audio recordings, and transcripts from the CDC “Sustaining the Zika Response in 2017” webinar series are now available at https://www.cdc.gov/zika/public-health-partners/partner-presentations.html. Webinars currently online include the following events.

  • Laboratory– March 15 (Domestic and Pacific Islands/Territories)
  • Communications – March 22
  • Epidemiology – March 23
  • Vector Issues – March 28
  • Pregnancy and Birth Defects – March 29
  • Blood Safety – March 30
  • Medical Investigations – March 30

New Jersey: NJDOH and NJ American Academy of Pediatrics Co-Sponsors Conference "From ALD to Zika: Newborn Screening and Surveillance in New Jersey"
Date: April 25, 2017
Time: 8:30 a.m. – 3:30 p.m.
Location: National Conference Center, 399 Monmouth Street, East Windsor, NJ
Registration Fee: $25
Registration Link

July 17-19 | Summer Workshop on Pandemics, Bioterrorism, and Global Health Security: From Anthrax to Zika
Pandemics, Bioterrorism and Global Health Security: From Anthrax to Zika is a three-day, non-credit summer workshop designed to introduce participants to the challenges facing the world at the intersection of national security, public health and the life sciences. The workshop is hosted by the Schar School of Policy and Government at George Mason University. The workshop will be held July 17-19, 2017 in Arlington, VA.


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.