A person in Middlesex County has tested positive for the mosquito-borne Zika virus, according to the New Jersey Department of Health.

Health officials have not yet said which town the patient who tested positive was in, or where they acquired the virus. According to the Centers for Disease Control, all the Zika cases identified in the United States so far this year have been associated with travel.

The last cases of Zika virus in New Jersey were reported in 2020, according to the Department of Health. During that year, three Zika cases were reported in New Jersey, including two in Essex County and one in Middlesex County. That represents a drop from 2019, when a total of 12 cases were reported in the Garden State.

Zika is mainly transmitted by Aedes mosquitos. The World Health organization says this type of mosquito primarily bites during the day. Most people infected with Zika do not develop symptoms, but when they do, they can include fever, rash, muscle pain, conjunctivitis and headaches. The symptoms can last for two to seven days.

The WHO says Zika can be especially dangerous during pregnancy and could result in microcephaly, miscarriage, preterm birth and possible congenital issues.

Currently, no vaccine is available for the prevention or treatment of Zika virus.