11/25/2023 0 Comments Hep b transmission prevention![]() ![]() However, because not all viral hepatitis infections are diagnosed or transmitted to NNDSS, CDC traditionally relies on data sources outside of NNDSS to estimate prevalence, including the National Health and Nutrition Examination Survey (NHANES), Centers for Medicare and Medicaid Services (CMS), insurance claims data, hospital discharge data, commercial laboratory data, and pharmacy data. Newly reported cases meeting the chronic hepatitis B and hepatitis C case definitions may reflect prevalent infections. Newly reported cases of hepatitis A, acute hepatitis B, perinatal hepatitis B, acute hepatitis C, and perinatal hepatitis C are considered incident cases. Viral hepatitis infections are required to meet specific age, clinical, laboratory, and epidemiologic linkage criteria before being classified as a case. National surveillance for viral hepatitis is based on case definitions developed and approved by CSTE in collaboration with CDC, which can be found on the CDC NNDSS website ( 4). This information is needed to confirm the diagnosis, determine a source of infection, identify others at risk for infection, and inform prevention measures. Additional information collected through NNDSS includes clinical features, laboratory test results, and risk behaviors or exposures potentially associated with infection. Case notifications do not include PII as CDC lacks the authority to receive that information and does not conduct follow-up or intervention activities on cases.Īs new reports of viral hepatitis infection are received, HDs report information to CDC, including diagnosis, event dates (e.g., illness onset date), and demographic data (e.g., state/territory, county, sex, age, race, and ethnicity). The NNC List is established through a collaboration between CSTE and CDC and is based on conditions for which there is mandatory reporting to HDs, laboratory tests approved by the US Food and Drug Administration (FDA), and established CDC/CSTE case definitions. HDs then notify CDC of cases of conditions that are included on the Nationally Notifiable Condition (NNC) List. Personal identifiable information (PII) is collected to enable HDs to identify cases for follow-up and to implement prevention and control measures. The core component of the national viral hepatitis surveillance system is voluntary notification of cases by state, local, and territorial health departments (HDs) to CDC’s National Notifiable Diseases Surveillance System (NNDSS).Įach state and territory mandates the conditions and diseases that should be reported to HDs when identified by laboratories, health care providers, and health care facilities. Viral hepatitis infections under surveillance by the CDC include hepatitis A, hepatitis B (acute, chronic, and perinatal), and hepatitis C (acute, chronic, and perinatal). Public health surveillance is the foundation upon which public health programs are designed to prevent and control diseases. ![]()
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