Health officials in Wisconsin say the state is dealing with an unprecedented number of cases of Zika virus, which is the world’s worst-known mosquito-borne virus.
The latest case, confirmed Sunday, was in the state’s north side.
A total of 4,800 people are infected with the virus.
On Sunday, health officials issued a new advisory for the state to monitor the spread of the virus in a state where it’s the fifth most common cause of death.
The state has reported more than 16,500 confirmed cases and more than 4,500 deaths from the virus since March, with many of the cases being spread from one person to another.
The most recent cases were in Milwaukee, where more than 500 people have been infected with Zika.
State Health Commissioner Scott Walker said the state has a high-risk population of infected individuals who may be vulnerable to transmission of Zika.
The outbreak is also spreading to the southeast, including to New York City, according to the governor’s office.
Walker said Sunday that the state will start tracking the virus, as it has in other states, including Texas, Oklahoma and Florida.
He said the virus is not currently on the US Department of Health and Human Services (HHS) list of highly contagious diseases.
He also noted that it’s a new Zika virus and that he is confident the virus will be contained in the United States.
The US Centers for Disease Control and Prevention says the virus has the potential to cause birth defects in fetuses, and the World Health Organization (WHO) has recommended the U.S. states focus on limiting the spread and isolating people in the states that are experiencing outbreaks.