Chicago Health Experts Reassure Public of Low Hantavirus Risk Amid 2026 Andes-Virus Cruise Ship Outbreak

Following three deaths aboard the MV Hondius cruise ship in May 2026 from confirmed Andes-virus (ANDV)—a human-to-human transmissible hantavirus strain—Chicago health authorities and CDC officials have stated there is no immediate threat to the Midwest. The outbreak occurred during Atlantic transit, with cases evacuated to Amsterdam. Experts note Illinois has seen only one hantavirus case in the past decade (2019). While the virus is primarily rodent-borne and spreads through contact with infected urine/fecal matter, human-to-human transmission is documented with close, prolonged contact. Researchers attribute emerging hantavirus outbreaks to climate change, deforestation, and urbanization creating novel wildlife-human interactions. Public guidance emphasizes protective measures for outdoor workers and those handling areas with rodent activity.