On March 4, 2017, an epidemic spread on the island. The disease was resistant even to magical cures. Island authorities identified the spread of the disease as an act of terrorism. The disease had several strains which seemed to target specific supernatural demographics.
For most of March, Starlight Academy was closed. Infected residents were brought to a quarantine hospital in the forests of Manta Carlos, far away from the rest of the city. The quarantine ended when a group of terrorists attempted to destroy the hospital and its occupants with bombs. Once the threat was identified, authorities and patients worked together to remove many of the bombs before they could detonate, and the patients were evacuated before armed terrorists could make an attempt to assault the hospital.
A company known as Blue Cross came out with an antiviral treatment which they believed could cure the disease, but it could only be produced in small amounts. The first batch sold out almost instantly, costing hundreds of dollars per bottle. This "cure" was later found to be ineffective, and all those who had taken the cure would later become even more sick than those who hadn't. The lead researcher involved in creating this cure, a mysterious "Dr. Holmes," disappeared before he could be reached for comment. Later investigations found that Holmes was likely responsible for creating the virus in the first place.
By the end of March an effective cure for the disease had been found. The government and Caduceus worked together to distribute the cure to the entire population. Some of those who refused to take the cure would die as the disease progressed into its final stages.
Even after receiving the cure, some of the disease's survivors retained permanent physical mutations caused by their strain of the disease. (More information about the event and the virus's different strains can be found in the
March Virus event thread.)