What will the average number of measles cases be during Trump's term?
The average measles cases per year during Trump's term will exceed 2,300, making the 'Yes' outcome (average above this threshold) highly probable at approximately 88%.
Analysis
The measles outbreak during the Trump Administration has reached unprecedented levels, with 2025 confirming 2,289 cases and 2026 already surpassing 2,260 cases by mid-July, projecting a full-year total likely exceeding 2,300 and potentially reaching 5,000 to 7,000 according to some expert estimates. With two years of the four-year term (2025 and 2026) already averaging over 2,270 cases annually and the trajectory indicating continued high transmission due to unvaccinated populations and policy changes, the average for the full term will almost certainly remain well above 2,300 cases per year. The current market price of 33% for 'Yes' appears significantly mispriced, underestimating the severity of the ongoing crisis and the likelihood that 2027 and 2028 will not drop back to pre-2025 baselines of ~285 cases given the entrenched transmission chains and declining vaccine confidence.
Arguments
For
- 2025 and 2026 already average 2,274 cases, requiring only modest 2027-2028 totals to exceed 2,300 average
- 2026 is on track to be the highest year in 35 years, surpassing 2025's record
- Transmission chains from 2025 remain uncontained with 1,360 cases in 2026 attributable to prior outbreaks
- US is highly likely to lose measles elimination status, indicating sustained high incidence
Against
- If 2027 and 2028 drop to pre-2025 levels of ~285 cases, the average could fall below 2,300
- 2026 final count might not reach projected 5,000-7,000 if outbreaks are contained unexpectedly
- Market may be betting on policy changes or vaccination surges not yet reflected in current data
- Uncertainty in long-term trajectory beyond 2026 with limited data for 2027-2028
Key drivers
- 2025 and 2026 case counts already averaging over 2,270 annually
- Expert projections for 2026 ranging from 2,300 to 7,000 cases
- 93% of 2026 cases are unvaccinated or unknown status, indicating sustained vulnerability
- Policy changes by Health Secretary RFK Jr. and CDC capacity reduction hindering containment
Risk factors
- Potential for rapid vaccination campaigns or policy reversals in 2027-2028 reducing cases
- Unforeseen natural decline in outbreak momentum if transmission chains break
- Data uncertainty in projecting 2027 and 2028 totals with current trajectory
- Possibility that 2026 final count falls slightly below 2,300 despite mid-year projections
Scenarios
Best case
2027 and 2028 see rapid decline to ~300 cases annually due to successful vaccination campaigns and policy reversals, bringing the four-year average to approximately 1,250 cases, resulting in a 'No' outcome.
Most likely
2026 ends near 2,500-3,000 cases, with 2027-2028 stabilizing around 2,000-2,500 annually as outbreaks persist but do not explode further, resulting in an average of approximately 2,400-2,500 cases per year and a 'Yes' outcome.
Worst case
2026 reaches 7,000 cases and 2027-2028 remain above 3,000 annually due to continued policy failures and unvaccinated spread, pushing the average to over 4,000 cases, confirming a 'Yes' outcome.
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