Trader consensus on Polymarket implies a 75.5% probability that the CDC will issue a new Level 3 Travel Health Notice—recommending travelers reconsider nonessential trips due to high disease risk—by December 31, 2026, driven by the recent hantavirus outbreak on the MV Hondius cruise ship, where the CDC activated a routine Level 3 emergency response as of early May amid dispersed passengers across multiple countries. Official CDC data confirms no current Level 3 notices, but multiple Level 2 alerts persist for meningococcal disease in the Democratic Republic of the Congo, yellow fever in Venezuela, chikungunya outbreaks in several nations, circulating poliovirus globally, and clade II mpox in Ghana and Liberia, with updates as recent as March 2026. Hantavirus's high case-fatality rate (up to 38%) and limited but monitored person-to-person potential in certain strains heighten escalation risks, though surveillance shows no sustained transmission; next CDC outbreak reports and FluView updates expected soon could refine epidemiological trajectories.