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Volume 19, Number 3—March 2013

Research

Effects of Vaccine Program against Pandemic Influenza A(H1N1) Virus, United States, 2009–2010

Rebekah H. Borse1, Sundar S. Shrestha, Anthony E. Fiore, Charisma Y. Atkins, James A. Singleton, Carolyn Furlow, and Martin I. MeltzerComments to Author 
Author affiliations: Author affiliation: Centers for Disease Control and Prevention, Atlanta, Georgia, USA

Main Article

Table 3

Estimated number of cases of influenza prevented by vaccination against influenza A(H1N1)pdm09 virus*

Subgroup
No. clinical cases in absence of vaccination program (range)
No. clinical cases prevented by a vaccination program (range)
No. doses administered to avoid 1 clinical case (range)
6 mo–9 y 12,333,906 (8,766,004–18,088,655) 81,518 (52,081–100,349) 326 (265–511)
10–24 y (10–17 all, 18–24 NP) 13,891,877 (9,879,008–20,374,801) 300,724 (212,953–420,991) 53 (38–75)
Pregnant 18–64 y 1,410,032 (1,004,978–2,062,896) 71,601 (53,084–97,884) 34 (25–45)
25–64 y, HR, NP 8,378,054 (5,957,746–12,286,626) 164,958 (116,575–228,593) 56 (40–79)
25–64 y, HCW, non-HR, NP 3,530,341 (2,510,291–5,178,995) 123,427 (87,287–177,144) 51 (35–72)
25–64, contact with <6 mo, non-HCW, non-HR, NP 1,550,007 (1,101,603–2,276,098) 29,063 (19,904–43,129) 70 (47–102)
25–64 y, noncontact with <6 mo, non-HCW, non-HR, NP 14,734,336 (10,470,235–21,640,930) 163,327 (107,305–248,548) 94 (62–143)
>65 y
6,038,353 (4,290,972–8,868,687)
94,538 (63,719–142,293)
114 (76–169)
Total
61,866,905 (43,980,837–90,777,687)
1,029,157 (712,908–1,458,930)
86 (61–124)
*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.

Main Article

1Current affiliation: Merck & Co., Inc., Lansdale, Pennsylvania, USA.

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