The primary driver of the 97.5% market-implied probability against a hantavirus pandemic in 2026 is the successful containment of the Andes orthohantavirus outbreak aboard the MV Hondius cruise ship, which produced roughly 13 confirmed or probable cases and three deaths through limited person-to-person transmission before quarantine and 42-day monitoring periods ended with no sustained community spread. Official CDC and WHO assessments, along with contact tracing across multiple countries, confirmed that the virus—primarily rodent-borne with inefficient human transmission requiring prolonged close contact—did not evolve enhanced spread or generate secondary clusters outside the initial exposure group. Argentina’s seasonal case totals remain consistent with historical patterns at endemic levels. While mutation increasing transmissibility or undetected zoonotic spillovers could theoretically shift outcomes, current surveillance data through September show no such developments.