Table 4.
Estimated proportions of four tester types in Atlanta and Seattle.
| Tester type | Atlanta | Seattle |
| Never testers | 3.5% | 2.5% |
| Opportunistic-only testers | 37.0% | 13.8% |
| Regular testers | 44.0% | 64.9% |
| Risk-based testers | 15.5% | 18.8% |
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