Table. Statewide Estimates of Averted COVID-19 Cases and Hospitalizations in California Due to Vaccination Among Children Aged 6 Months to 15 Yearsa.
| Age group (vaccine eligibility date) | Postvaccine period (length, d) | Children vaccinated, No. (%) | Observed, No. | Expected, No. (95% PI) | Averted, No. (95% PI) | % Averted (95% PI) | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cases | Hospitalizations | Cases | Hospitalizations | Cases | Hospitalizations | Cases | Hospitalizations | |||
| 12-15 y (May 10, 2021) | June 10, 2021, to October 29, 2021 (144) | 1 712 868 (53.5) | 248 296 | 688 | 394 506 (392 545 to 396 467) | 747 (623 to 932) | 146 210 (136 056 to 158 948) | 59 (−65 to 244) | 37.1 (34.5 to 40.3) | 7.9 (−8.7 to 32.7) |
| 5-11 y (October 29, 2021) | November 19, 2021, to June 17, 2022 (199) | 1 219 432 (34.8) | 739 830 | 729 | 969 964 (940 000 to 1 000 497) | 775 (650 to 950) | 230 134 (200 170 to 265 149) | 46 (−79 to 221) | 23.7 (20.6 to 27.3) | 5.8 (−10.2 to 28.6) |
| 6-59 mo (June 17, 2022) | July 17, 2022, to February 27, 2023 (225) | 177 087 (7.9) | 67 287 | 520 | 67 027 (66 321 to 67 733) | 688 (561 to 844) | −259 (−1938 to 1019) | 168 (42 to 324) | −0.4 (−2.9 to 1.5) | 24.4 (6.1 to 47.1) |
Abbreviation: PI, prediction interval.
a
The expected number of cases and hospitalizations for each age group is calculated according to the counterfactual predictions.