Recent hantavirus cases tied to the MV Hondius cruise ship, including three deaths from Andes virus, prompted the CDC to activate its Emergency Operations Center at the lowest Level 3 response on May 8, 2026, while monitoring dispersed passengers across U.S. states. This coincides with over 1,800 confirmed measles cases nationwide this year amid declining vaccination rates and summer travel, alongside ongoing H5N1 avian influenza surveillance. No Level 3 Travel Health Notice ("Reconsider Nonessential Travel") is active yet, but historical patterns show multiple such notices annually for outbreaks like yellow fever or meningococcal disease. Trader consensus at 75.5% implied probability reflects these pressures, though new surveillance data or contained spread could alter outcomes before year-end.