Table 3. Estimated average incidence of otitis media cases and visits averted by PCVs, United States, 1997–2019*.

Measure	1997–1999	2000–2009	2010–2019	Cumulative
Average incidence of visits per 100 children	78	59	46	NA
Expected visits†	NA	154,269,900	155,511,917	309,781,817
Estimated visits	NA	119,429,938	93,025,190	212,455,128
Visits averted‡	NA	34,839,962	62,486,726	97,326,688

*Values are rounded to the nearest whole numbers. PCV7 was approved for use in the United States in 2000; PCV13 was approved for use in the United States in 2010. NA, not applicable; PCV, pneumococcal conjugate vaccine; PCV7, 7-valent PCV; PCV13, 13-valent PCV.
†Visits expected if PCVs had not been introduced.
‡Calculated by subtracting estimated visits from expected visits.