MDH confirms first Maryland West Nile virus case of 2026

MARYLAND (WBFF) — The Maryland Department of Health announced Friday an individual living in Maryland tested positive for the West Nile virus.

This is the first confirmed human case in the state this year, said MDH officials.

MDH says it will not provide any additional information about the patient to protect the individual’s privacy.

West Nile is transmitted to humans via mosquitoes infected by feeding on birds that have the virus. In rare instances, the virus may be spread from person to person through organ donation, blood transfusion, breastfeeding or from a pregnant mother to fetus.

The disease affects the nervous system, and up to 80% of people who are infected will not display any signs of illness. Some people who develop illness may experience mild symptoms such as fever, headache and body aches, and a skin rash and swollen lymph glands may be noticed. These symptoms may last a few days or as long as several weeks.

Those who have underlying health conditions could become seriously ill.

“We are in the season when the West Nile virus and other mosquito-borne viruses can spread in Maryland,” said Deputy Secretary for Public Health Services Dr. Meg Sullivan. “Your best defense against West Nile virus is to protect yourself from mosquitoes, such as using insect repellent, covering exposed skin, and eliminating standing water near your home.”

Marylanders are recommended to take preventative steps to reduce their risk of infection from mosquitoes.

The number of Marylanders infected with the virus fluctuates each season. In 2025, 23 Maryland residents were confirmed positive with the infection.

The West Nile virus was first detected in the U.S. in 1999.