No at 90.5% reflects the absence of any disease achieving sustained human-to-human transmission capable of global spread through mid-2026. Official monitoring by WHO and CDC shows recent Ebola and hantavirus events remain regionally contained or travel-linked without pandemic-scale growth, while H5N1 avian influenza lacks confirmed efficient person-to-person spread despite ongoing surveillance for genetic changes. Enhanced post-COVID preparedness, including improved diagnostics and early-warning systems, further supports trader consensus. A realistic challenge could arise from rapid viral evolution enabling airborne transmission of a zoonotic pathogen or unexpected escalation of filovirus outbreaks beyond current containment thresholds.