Current CDC surveillance data show no active outbreaks meeting the extreme-risk criteria for a Level 4 Travel Health Notice, which requires conditions with no effective precautions and is reserved for rare events such as uncontrolled Ebola-like transmission. As of mid-May 2026, all active notices remain at Level 1 (global dengue) or Level 2 (polio, chikungunya), reflecting manageable case rates and available mitigation tools like vaccines or vector control. Recent alerts for imported hantavirus on a cruise ship and measles clusters have prompted only clinician guidance, not travel restrictions, consistent with low community transmission and high population immunity. Without a novel pathogen surge or breakdown in containment, the market-implied 78 percent probability of no Level 4 issuance by year-end aligns with the absence of qualifying escalations in official monitoring.