Table 1.
Probability of an infected individual transmitting influenza to a susceptible individual during an interaction between the two
| Contact group | Infected individual | Susceptible individual | Transmission probability* |
|---|---|---|---|
| Household | Adult | Adult | 0·4 |
| Household | Child | Adult | 0·3 |
| Household | Adult | Child | 0·3 |
| Household | Child | Child | 0·6 |
| School | Elementary student | Elementary student | 0·0435 |
| School | Middle student | Middle student | 0·0375 |
| School | High student | High student | 0·0315 |
| Workplace | Adult | Adult | 0·0575 |
| Hospital | HCW | HCW | 0·0575 |
| Hospital | HCW | Patient | 0·01 |
| Hospital | Patient | HCW | 0·01 |
| Community | All | Child | 0·00255 |
| Community | All | Adult | 0·00480 |
HCW, health care worker.
*Transmission probabilities are obtained from Ref. 11, table 3. Transmission calibration is based on H2N2 pandemic of 1957–1958 as H1N1 transmission probabilities are not currently available.