As of January 2025, weekly NNDSS PDF and text table formats will be available via CDC Stacks, a public online data repository instead of on WONDER. The HTML format has been updated to improve user experience and data can be found on data.cdc.gov, a publicly available catalog of data resources. This change reflects efforts to make CDC data more responsive and efficient. For questions, email NNDSSWeb@cdc.gov.
ERRATA:  Week 21 case counts for NNDSS data were updated on Thursday, June 7, 2017.
Case counts in Tables I and II were updated in the following sections of the Tables:
Table I columns: 'Current week', 'Cum 2017', '5-year weekly average', 'Total cases reported for 2016', and 'States reporting cases during current week'
Table II columns: 'Current week', 'Previous 52 weeks (Med/Max)', 'Cum 2017', 'Cum 2016'

Nationally Notifiable Infectious Diseases and Conditions, United States: Weekly Tables

(Weekly data are available from Week 01, 1996 through Week 52, 2024)
Year Week
Tables available for Week 25, 2017
Table I Infrequently reported notifiable diseases (Export Data) (PDF)
Table II (part 1) Babesiosis; Campylobacteriosis (Export Data) (PDF)
Table II (part 2) Chlamydia; Coccidioidomycosis (Export Data) (PDF)
Table II (part 3) Cryptosporidiosis; Dengue Virus (Export Data) (PDF)
Table II (part 4) Ehrlichiosis/Anaplasmosis (Export Data) (PDF)
Table II (part 5) Giardiasis; Gonorrhea; Haemophilus influenzae (Export Data) (PDF)
Table II (part 6) Hepatitis A,B (Export Data) (PDF)
Table II (part 7) Hepatitis C (Export Data) (PDF)
Table II (part 8) Invasive Pneumococcal disease, all ages (Export Data) (PDF)
Table II (part 9) Invasive Pneumococcal disease, age < 5 (Export Data) (PDF)
Table II (part 10) Legionellosis; Malaria (Export Data) (PDF)
Table II (part 11) Meningococcal disease; Mumps; Pertussis (Export Data) (PDF)
Table II (part 12) Rabies, animal; Rubella (Export Data) (PDF)
Table II (part 13) Salmonellosis; Shiga toxin-producing E. coli; Shigellosis (Export Data) (PDF)
Table II (part 14) Spotted Fever Rickettsiosis; Syphilis (Export Data) (PDF)
Table II (part 15) Tetanus; Varicella (chickenpox) (Export Data) (PDF)
Table II (part 16) Vibriosis (Export Data) (PDF)
Table II (part 17) West Nile virus disease (Export Data) (PDF)
Table III Tuberculosis (Export Data) (PDF)
See also Annual Tables
Notes:
  • These are weekly cases of selected infectious national notifiable diseases, from the National Notifiable Diseases Surveillance System (NNDSS). NNDSS data reported by the 50 states, New York City, the District of Columbia, and the U.S. territories are collated and published weekly as numbered tables. Cases reported by state health departments to CDC for weekly publication are subject to ongoing revision of information and delayed reporting. Therefore, numbers listed in later weeks may reflect changes made to these counts as additional information becomes available. Case counts in the tables are presented as published each week. See also Guide to Interpreting Provisional and Finalized NNDSS Data.
  • Weekly tables since 1996 are available on CDC WONDER.
  • Weekly tables since 2014 are available on Data.CDC.gov.
  • Weekly tables for 1952–2017 published in the Morbidity and Mortality Weekly Reports (MMWR) are available at CDC Stacks MMWR, and weekly tables starting in 2018 are available at CDC Stacks NNDSS (once in CDC Stacks NNDSS select "Weekly Tables" in the "Genre" box at the left).
  • Notices, errata, and other notes are available in the Notice To Data Users page.
  • The list of national notifiable infectious diseases and conditions and their national surveillance case definitions are available at https://ndc.services.cdc.gov/. This list incorporates the Council of State and Territorial Epidemiologists (CSTE) position statements approved by CSTE for national surveillance.
Suggested Citation:
  • Centers for Disease Control and Prevention. National Notifiable Diseases Surveillance System, Weekly Tables of Infectious Disease Data. Atlanta, GA. CDC Division of Health Informatics and Surveillance. Available at: https://www.cdc.gov/nndss/data-statistics/index.html.
Acknowledgment:
  • CDC acknowledges the local, state, and territorial health departments that collected the data from a range of case ascertainment sources (e.g., health-care providers, hospitals, laboratories) and reported these data to CDC's National Notifiable Diseases Surveillance System.