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Number of cross-contamination cases at node 5 by letter spore count, and the age of recipient and the proportion in each generation level
| Spore count | Number of cases by age of recipient, years
|
Proportion of cases by generation level of letter received
|
|||||
|---|---|---|---|---|---|---|---|
| <25 | 25–44 | 45–65 | >65 | First | Second | Third | |
| 103 to 104 | 0.007 | 0.08 | 0.14 | 0.45 | 1.0 | 0.0 | 0.0 |
| 102 to 103 | 0.009 | 0.10 | 0.16 | 0.47 | 0.83 | 0.17 | 0.0 |
| 101 to 102 | 0.011 | 0.11 | 0.19 | 0.54 | 0.71 | 0.28 | 0.01 |
