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

TABLE 1z. Weekly cases* of notifiable diseases, United States, U.S. Territories, and Non-U.S. Residents week ending December 19, 2020 (Week 51)
Reporting Area Pertussis § Plague Poliomyelitis, paralytic
Current weekPrevious 52 weeks Max †Cum YTD 2020 †Cum YTD 2019 †Current weekPrevious 52 weeks Max †Cum YTD 2020 †Cum YTD 2019 †Current weekPrevious 52 weeks Max †Cum YTD 2020 †Cum YTD 2019 †
U.S. Residents, excluding U.S. Territories 8 1,137 5,361 17,480 - 2 7 1 - 0 - -
New England - 17 95 860 - 0 - - - 0 - -
Connecticut - 1 4 63 - 0 - - - 0 - -
Maine - 12 28 379 - 0 - - - 0 - -
Massachusetts - 6 44 291 - 0 - - - 0 - -
New Hampshire - 2 4 48 - 0 - - - 0 - -
Rhode Island - 8 4 36 - 0 - - - 0 - -
Vermont - 3 11 43 - 0 - - - 0 - -
Middle Atlantic - 60 612 2,018 - 0 - - - 0 - -
New Jersey - 10 7 448 - 0 - - - 0 - -
New York (excluding New York City) - 28 144 731 - 0 - - - 0 - -
New York City - 8 66 219 - 0 - - - 0 - -
Pennsylvania - 34 395 620 - 0 - - - 0 - -
East North Central - 95 1,070 3,050 - 0 - - - 0 - -
Illinois - 39 337 898 - 0 - - - 0 - -
Indiana - 4 38 217 - 0 - - - 0 - -
Michigan - 16 104 535 - 0 - - - 0 - -
Ohio - 51 470 880 - 0 - - - 0 - -
Wisconsin - 19 121 520 - 0 - - - 0 - -
West North Central - 33 275 1,639 - 0 - - - 0 - -
Iowa - 4 23 240 - 0 - - - 0 - -
Kansas - 8 20 188 - 0 - - - 0 - -
Minnesota - 7 37 460 - 0 - - - 0 - -
Missouri - 15 119 378 - 0 - - - 0 - -
Nebraska - 6 56 188 - 0 - - - 0 - -
North Dakota - 6 17 38 - 0 - - - 0 - -
South Dakota - 4 3 147 - 0 - - - 0 - -
South Atlantic 2 86 786 1,908 - 0 - - - 0 - -
Delaware - 3 16 7 - 0 - - - 0 - -
District of Columbia - 2 9 26 - 0 - - - 0 - -
Florida 2 22 217 379 - 0 - - - 0 - -
Georgia - 14 203 330 - 0 - - - 0 - -
Maryland - 5 32 99 - 0 - - - 0 - -
North Carolina - 16 187 481 - 0 - - - 0 - -
South Carolina - 7 11 222 - 0 - - - 0 - -
Virginia - 43 90 328 - 0 - - - 0 - -
West Virginia - 3 21 36 - 0 - - - 0 - -
East South Central - 24 309 707 - 0 - - - 0 - -
Alabama - 14 150 253 - 0 - - - 0 - -
Kentucky - 14 58 208 - 0 - - - 0 - -
Mississippi - 2 9 53 - 0 - - - 0 - -
Tennessee - 9 92 193 - 0 - - - 0 - -
West South Central - 152 352 1,422 - 0 - - - 0 - -
Arkansas - 5 38 129 - 0 - - - 0 - -
Louisiana - 4 34 85 - 0 - - - 0 - -
Oklahoma - 13 - 34 - 0 - - - 0 - -
Texas - 134 280 1,174 - 0 - - - 0 - -
Mountain 4 67 863 2,205 - 2 7 1 - 0 - -
Arizona - 27 339 364 - 1 1 - - 0 - -
Colorado 4 16 232 458 - 1 2 - - 0 - -
Idaho - 17 59 246 - 0 - - - 0 - -
Montana - 5 40 492 - 0 - - - 0 - -
Nevada - 6 13 72 - 0 - - - 0 - -
New Mexico - 8 56 164 - 1 4 1 - 0 - -
Utah - 12 113 379 - 0 - - - 0 - -
Wyoming - 4 11 30 - 0 - - - 0 - -
Pacific 2 673 999 3,671 - 0 - - - 0 - -
Alaska - 3 12 45 - 0 - - - 0 - -
California - 60 595 3,172 - 0 - - - 0 - -
Hawaii - 4 15 52 - 0 - - - 0 - -
Oregon - 20 132 402 - 0 - - - 0 - -
Washington 2 598 245 - - 0 - - - 0 - -
U.S. Territories - 5 4 160 - 0 - - - 0 - -
American Samoa - 0 - - - 0 - - - 0 - -
Commonwealth of Northern Mariana Islands - 0 - - - 0 - - - 0 - -
Guam - 0 - 12 - 0 - - - 0 - -
Puerto Rico - 5 4 148 - 0 - - - 0 - -
U.S. Virgin Islands - 0 - - - 0 - - - 0 - -
Non-U.S. Residents - 0 - - - 0 - - - 0 - -
Total 8 1,138 5,365 17,640 - 2 7 1 - 0 - -
  • U: Unavailable — The reporting jurisdiction was unable to send the data to CDC or CDC was unable to process the data.
  • -: No reported cases — The reporting jurisdiction did not submit any cases to CDC.
  • N: Not reportable — The disease or condition was not reportable by law, statute, or regulation in the reporting jurisdiction.
  • NN: Not nationally notifiable — This condition was not designated as being nationally notifiable.
  • NP: Nationally notifiable but not published.
  • NC: Not calculated — There is insufficient data available to support the calculation of this statistic.
  • Cum: Cumulative year-to-date counts.
  • Max: Maximum — Maximum case count during the previous 52 weeks.
  • * Case counts for reporting year 2020 are provisional and subject to change. Cases are assigned to the reporting jurisdiction submitting the case to NNDSS, if the case's country of usual residence is the U.S., a U.S. territory, unknown, or null (i.e. country not reported); otherwise, the case is assigned to the 'Non-U.S. Residents' category. Country of usual residence is currently not reported by all jurisdictions or for all conditions. For further information on interpretation of these data, see https://wwwn.cdc.gov/nndss/document/Users_guide_WONDER_tables_cleared_final.pdf.
  • †Previous 52 week maximum and cumulative YTD are determined from periods of time when the condition was reportable in the jurisdiction (i.e., may be less than 52 weeks of data or incomplete YTD data).
  • § The pertussis case definition was modified by CSTE effective January 1, 2020. Criteria were modified increasing sensitivity for case ascertainment such that case counts may increase.
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 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://wwwn.cdc.gov/nndss/conditions/. 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://wwwn.cdc.gov/nndss/infectious-tables.html.
Acknowledgement:
  • 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.