IID-23 Reduce hepatitis A
About the Data
Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Number of new symptomatic hepatitis A cases reported in the past 12 months
Total population in reporting states
Data are rates per 100,000 population based on the number of symptomatic cases of hepatitis A reported to NNDSS. A case definition for new symptomatic cases of hepatitis A is available from CDC.
To obtain state-specific measures for this measure, local Viral Hepatitis Surveillance Program data are used to determine the number of symptomatic hepatitis A cases occurring in the state in the past 12 months.
FOR SINGLE DATA YEARS: Case rates are calculated based on the resident population of the United States for the data year involved. For census years (e.g. 2010), population counts enumerated as of April 1 are used. For all other years, populations estimates as of July 1 are used. Postcensal population estimates are used in rate calculations for years after a census year and match the data year vintage (e.g. July 1, 2011 resident population estimates from Vintage 2011 are used as the denominator for 2011 rates). Postcensal population estimates are used in rate calculations for the years between censuses (e.g. 1991-1999, 2001-2009). Race-specific population estimates for 1991 and later use bridged-race categories.
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.
Additional resources about the objective
- CDC. Prevention of hepatitis A through active or passive immunization: recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR 2006;55 (No. RR-7).
- Centers for Disease Control and Prevention (CDC). Case definitions for infectious conditions under public health surveillance.
- Daniels D, Grytdal S, Wasley A. Surveillance for acute viral hepatitis - United States, 2007. MMWR Surveillance Summary. May 22 2009;58(3):1-27.