The MV Hondius, a Dutch vessel, departed from Ushuaia, Argentina and followed an itinerary across the South Atlantic, with multiple stops in remote and ecologically diverse regions, including South Georgia, Nightingale Island, Tristan da Cunha, Saint Helena, and Ascension Island. Case 1 (Gh_ID1) and Case 2 (Gh_ID2) were on board. The extent of passenger contact with local wildlife during the voyage, or prior to boarding remains undetermined. The vessel is carrying a total of 175 individuals, including 114 passengers and 61 crew members.