New Jersey officials are now investigating whether a resident’s malaria infection was locally acquired. The New Jersey Departments of Health (NJDOH) and Environmental Protection reported on the case Monday.

Officials in New Jersey are investigating a case of malaria in Morris County, and they believe the resident may have been infected locally. Officials report that the resident has no history of international travel.

A Morris County resident may have contracted the illness locally, which would be the first known instance in decades of someone being exposed while in the state.