By Pooja Toshniwal Paharia Reviewed by Susha Cheriyedath, M.Sc. Jun 23 2026 An expedition cruise became the center of a rare Andes virus outbreak, prompting international contact tracing, quarantine, testing, and genomic analysis to contain a deadly pathogen known for occasional person-to-person spread. Rapid Communication: Andes virus outbreak linked to expedition cruise ship travel, multi-country investigation and response, April to June 2026 . Image Credit: HD-Warrior80 / Shutterstock A