What to know
This table reports the number of cases of tuberculosis (TB) disease and clusters by cluster size in the United States from 2021 to 2023.
Tuberculosis Cases and Clusters by Cluster Size:1 United States, 2021–2023
| Cluster size | Clusters | Cases2 | ||
|---|---|---|---|---|
| No. | (%)3 | No. | (%)4 | |
| Total | 1,110 | (100.0) | 3,384 | (100.0) |
| 2 case cluster | 758 | (68.3) | 1,516 | (44.8) |
| 3 case cluster | 172 | (15.5) | 516 | (15.2) |
| 4 case cluster | 64 | (5.8) | 256 | (7.6) |
| 5 case cluster | 29 | (2.6) | 145 | (4.3) |
| 6 case cluster | 29 | (2.6) | 174 | (5.1) |
| 7 case cluster | 12 | (1.1) | 84 | (2.5) |
| 8 case cluster | 6 | (0.5) | 48 | (1.4) |
| 9 case cluster | 6 | (0.5) | 54 | (1.6) |
| ≥10 case cluster | 34 | (3.1) | 591 | (17.5) |
1wgMLSType clusters have two or more cases with matching wgMLSType within a county during the specified 3-year time period.
2Cases with matching wgMLSType are members of a cluster within a county during the specified 3-year time period.
3Percentages calculated based on the total number of clusters.
4Percentages calculated based on the total number of cases.
Note
Data for all years are updated through July 17, 2024.