Table 2 Data sources used to calculate the clinical attack rate among adults; CCS2 = second case control study.
From: A super-spreading ewe infects hundreds with Q fever at a farmers' market in Germany
Data source | III | Exposed | Attack rate |
|---|---|---|---|
(1) CCS2, interviewees in the telephone survey for the recruitment of controls | 8 | 35 | 23% |
(2) Adults who accompanied cases or controls (CCS2) | 8 | 32 | 25% |
(3) Cohort of sailor friends | 3 | 9 | 33% |
(4) Cohort of vendors | 13 | 82 | 16% |
Pooled (sources (1)-(4)) | 32 | 158 | 20% |
(5) Persons accompanying notified cases | 26 | 84 | 31% |
Pooled (sources (1)-(5)) | 58 | 242 | 24% |