Table 3. IPD cases due to capsular switch. Number of IPD cases due to switched pneumococcal strains, per 100,000 children under 2 years old, cumulated over the 10 years following the introduction of conjugate vaccination, as a function of the frequency of capsular switch selected in vaccinated individuals.

Vaccine-selected switch frequency (weeks−1)	Number of IPD cases (for 100,000 children) due to switched strains, cumulated over 10 years
0–2×10−4	0
3×10−4–1.6×10−3	1
1.7×10−3–5.8×10−3	2
5.9×10−3–10−2	3

Vaccination coverage is fixed at 90%.