How many cumulative year-to-date US resident cases of pertussis (aka whooping cough) will the CDC report as of Week 52 of 2026?
Closing Jan 01, 2027 08:01AM UTC
Cases of pertussis in the US fell from 2024 levels in 2025, but total cases remained historically elevated (CDC, CBS News). The total number of cases in 2025 reported through Week 52 (week ending 27 December 2025) was 28,132, which was lower than the 43,321 total for 2025 reported as of the end of 2025 (CDC Stacks - Pertussis (Week 52) 2025). The question will be suspended on 31 December 2026 if still open and the outcome determined using data as first reported by the CDC for the week ending 2 January 2027 (CDC Stacks, enter "Pertussis" in the "Search our Collections" field, click the magnifying glass icon, change "Relevance" to "Published Date (New to Old)," and see "U.S. Residents, excluding U.S. Territories" in the "Weekly cases of notifiable diseases" report for Pertussis, MMWR Week Overview).
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| Possible Answer | Crowd Forecast | Change in last 24 hours |
|---|---|---|
| Fewer than 5,000 | 0% | -8.33% |
| At least 5,000, but fewer than 10,000 | 30.50% | +22.17% |
| At least 10,000, but fewer than 15,000 | 38.00% | +29.67% |
| At least 15,000, but fewer than 20,000 | 14.50% | +6.17% |
| At least 20,000, but fewer than 25,000 | 10.00% | +1.67% |
| At least 25,000, but fewer than 30,000 | 3.50% | -4.83% |
| At least 30,000, but fewer than 35,000 | 1.50% | -6.83% |
| At least 35,000, but fewer than 40,000 | 0.50% | -7.83% |
| At least 40,000, but fewer than 45,000 | 0.50% | -7.83% |
| At least 45,000, but fewer than 50,000 | 0.50% | -7.83% |
| At least 50,000, but fewer than 55,000 | 0.50% | -7.83% |
| 55,000 or more | 0% | -8.33% |