FORT LAUDERDALE, Fla. – A 70-year-old man became the fifth COVID-19 patient in Broward County, the Florida Department of Health announced on Wednesday night.

Epidemiological investigators are working to find out where he was infected. Officials suspect it could have been in Hillsborough County. The man recently traveled to Tampa to attend a conference on emergency medical services.

“He is isolated and will continue to remain isolated until cleared by public health officials,” the state agency’s statement said.

Public health officials also announced the positive COVID-19 cases in Florida surged to 31, including a new case in Miami-Dade County.

The other four cases in Broward County include patients who are ages 65, 67, 69 and 75. Three of the patients were working in various cruise terminals at Port Everglades. The risk of infection did not faze spring breakers who invaded beaches and bars in Fort Lauderdale.