There was speculation of sonic weaponry being used against the staff, but the claims were unfounded. Several diplomats who were impacted by the illness became severely ill. Although a singular cause has yet to be determined, possible origins include toxic pesticides, ultrasounds, microwaves, or mass psychogenic illness.
Lost Colony of Roanoke
The island of Roanoke was established in 1585 by English settlers, right off the coast of North Carolina. 115 people were members of the colony, including the pregnant daughter of the settlement's new governor, John White. White left for England to procure more supplies. When he returned in 1590, nothing of Roanoke remained.