Estimates of the prevalence of pandemic (H1N1) 2009, United States, April-July 2009.
Through July 2009, a total of 43,677 laboratory-confirmed cases of influenza A pandemic (H1N1) 2009 were reported in the United States, which is likely a substantial underestimate of the true number. Correcting for under-ascertainment using a multiplier model, we estimate that 1.8 million-5.7 million cases occurred, including 9,000-21,000 hospitalizations.
Reed
Carrie
C
Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd NE, Mailstop A32, Atlanta, GA 30033, USA. creed1@cdc.gov
Angulo
Frederick J
FJ
Swerdlow
David L
DL
Lipsitch
Marc
M
Meltzer
Martin I
MI
Jernigan
Daniel
D
Finelli
Lyn
L
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology*; D008875:Middle Aged; D015995:Prevalence; D013997:Time Factors; D014481:United States / Q000453:epidemiology