Table 2 Posterior mean and 95% credible interval of transmission parameters of S. pneumoniae according to serotype inclusion in the vaccine. Transmission parameters consist of the mean duration of carriage μ, the child to child transmission rate β and the Secondary Attack Rate (SAR).
Vaccine serotype* | Non-vaccine serotype† | Ratio | ||||
|---|---|---|---|---|---|---|
Mean | 95% CI‡ | Mean | 95% CI‡ | Mean | 95% CI‡ | |
μ (days) | 23 | 21, 25 | 22 | 20, 24 | 1.06 | 0.94, 1.18 |
β (% day-1) | 4.6 | 4.2, 5.0 | 5.1 | 4.5, 5.6 | 0.91 | 0.80, 1.05 |
SAR (%) | ||||||
n = 30 § | 3.4 | 3.2, 3.7 | 3.6 | 3.3, 3.8 | 0.97 | 0.88, 1.06 |
n = 50 § | 2.1 | 1.9, 2.2 | 2.2 | 2.0, 2.3 | 0.97 | 0.88, 1.06 |
n = 100 § | 1.1 | 1.0, 1.2 | 1.1 | 1.0, 1.2 | 0.97 | 0.88, 1.06 |