Data derived from Fajara, Western Region studies.

Note: * Incidence per 100000 person-years.†Authors' unpublished data (BG).‡76/116 (66%) pneumococcal isolates were from blood cultures.§As estimates of age-specific NTS infection are not available, the incidence of NTS disease is estimated from the ratio of NTS to pneumococcal isolates, 39:76 = 0.51, and the estimated incidence of pneumococcal blood stream infection.∥Incidence of pneumococcal blood stream infection is calculated from values reported by Usen et al. 1998 [12] and the proportion of IPD due to blood stream infection (0.66), as 0–1 yr: 178×0.66 = 117, 2 yrs: 86×0.66 = 57, 3–4 yrs: extrapolated as half the incidence among those 2 yrs of age; 57/2 = 29,