Volume 13, Number 9—September 2007
Research
Detecting Human-to-Human Transmission of Avian Influenza A (H5N1)
Yang Yang*, M. Elizabeth Halloran*†, Jonathan D. Sugimoto*†, and Ira M. Longini*†
Table
Parameters and data used in analysis
| Category | Parameter/data | Required* |
|---|---|---|
| Entire outbreak | Outbreak begin date | X |
| Outbreak end date | X | |
| Latent/incubation period, d† | X | |
| Infectious period, d† | X | |
| All persons | Neighborhood of residence | X |
| Household of residence | X | |
| Sex | X | |
| Age, y | X | |
| Case status (yes or no) | X | |
| Case-patients | Whether outbreak index case-patient (yes or no) | X |
| Date of illness onset | X | |
| Outcome (recovered, died, or don’t know/still ill) | X | |
| Date of outcome | X | |
| Dates of hospitalization | O | |
| Period of receiving treatment (dates) | O | |
| Non–case-patients | Dates of hospitalization | O |
| Period of prophylactic treatment (dates) | O | |
| Inter-residence visits | Identifier for visiting person | X |
| Neighborhood visited | X | |
| Household visited | X | |
| Dates of the visit | X | |
| Analysis parameters | End of exposure to the common source of infection (date) | X |
| Final day of observation (date) | X | |
| R0 estimation | Mean no. residents per household | X‡ |
| Mean no. community contacts per person/d | X‡ |
*X, required; O, optional; R0, basic reproduction number.
†The user defines the distribution of this period, including the minimum and maximum length of the period.
‡Required to estimate R0.
