Volume 19, Number 3—March 2013
Research
Effects of Vaccine Program against Pandemic Influenza A(H1N1) Virus, United States, 2009–2010
Table 4
Estimated number of hospitalizations prevented by vaccination against influenza A(H1N1)pdm09 virus*
Subgroup | No. hospitalizations of persons in groups with no vaccination program (range) | No. hospitalizations prevented by a vaccination program (range) | No. doses administered to avoid 1 hospitalization (range) |
---|---|---|---|
6 mo–9 y | 54,745 (38,826–80,563) | 614 (328–1,090) | 43,333 (24,421–81,227) |
10–24 y, (10–17 all, 18–24 NP) | 63,117 (44,761–92,999) | 1,838 (1,179–3,032) | 8,654 (5,246–13,489) |
Pregnant, 18–64 y | 6,481 (4,590–9,582) | 446 (298–722) | 5,396 (3,336–8,072) |
25–64 y, HR, NP | 38,060 (26,990–56,074) | 1,029 (653–1,707) | 8,972 (5,409–14,132) |
25–64 y, HCW, non-HR, NP | 16,082 (11,394–23,734) | 721 (469–1,181) | 8,679 (5,294–13,324) |
25–64, contact with <6 mo, non-HCW, non-HR, NP | 7,020 (4,981–10,338) | 163 (104–270) | 12,478 (7,528–19,516) |
25–64 y, noncontact with <6 mo, non-HCW, non-HR, NP | 67,249 (47,743–98,922) | 902 (558–1,516) | 17,005 (10,124–27,524) |
>65 y |
27,789 (19,723–40,901) |
527 (334–876) |
20,444 (12,305–32,278) |
Total | 280,544 (199,009–413,112) | 6,240 (3,923–10,393) | 14,193 (8,522–22,575) |
*All values are estimates. NP, not pregnant; HR, high risk; HCW, health care worker; contact, household contacts and caregivers of children <6 mo of age.
1Current affiliation: Merck & Co., Inc., Lansdale, Pennsylvania, USA.