Jersey City has its first presumptive positive case of the coronavirus, Mayor Steve Fulop announced Friday morning.

Fulop said in a tweet that a 41-year-old Downtown resident was tested by her private physician. Her results were then transmitted to the city’s health department Communicable Disease Reporting Surveillance System.

“Our Health & Human Services is working aggressively and we have been preparing for this,” Fulop tweeted. “Our HHS will contact you PROACTIVELY if you have had contact with the individual.”

Gov. Phil Murphy announced Thursday that New Jersey had a total of 29 cases of coronavirus, including one in West New York. Murphy declared a state of emergency Monday amid growing concerns about the spread of the virus throughout the state.

COVID-19, the illness caused by the novel coronavirus, has sickened more than 1,700 people nationwide and led to at least 40 deaths.

“We will be providing more information and support as it becomes available but we wanted to make sure people are aware and not allow rumors to spread,” Fulop added in his tweets.

Jersey City residents can monitor local updates on the virus on the city’s website. Jersey City has also set up a 24-hour hotline. If residents suspect they have been exposed to the virus, call 201-547-5208 for instructions on how to proceed.