Three people in Maine have active tuberculosis, the world’s deadliest disease

Three people in Maine have been infected with active tuberculosis, the world’s deadliest disease, according to health officials who raised alarms Friday.

There was no connection between the three patients, all of whom were in the Portland area, suggesting they were all infected by different sources, according to the Maine Center for Disease Control and Prevention.

Health officials are working to identify and screen anyone who came in contact with the three individuals with the disease, a CDC spokesperson said, according to the Portland Press Herald.

Tuberculosis is the world’s deadliest disease, claiming about 1.25 million lives every year, largely in developing countries, according to the  World Health Organization.