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| Parameter | Symbol | Value |
| Transmission rate of early/acute |
|
1 per 47 days |
| Transmission rate of chronic |
|
1 per 1207 days |
| Mean duration of risk behavior |
|
19.5 years |
| Mean duration of early/acute period |
|
180 days |
| Mean duration of chronic period |
|
10 years |
