Notice: For data on COVID-19 in the United States, please see https://www.cdc.gov/coronavirus/2019-ncov/cases-in-us.html
Notice: Improvements in data processing at CDC were applied to 2020 and 2021 data beginning with the tables published for week 47. Case count changes between tables published for week 46 and week 47 may be due to changes in data processing rules and not due to changes in disease levels.

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

TABLE 1ff. Weekly cases* of notifiable diseases, United States, U.S. Territories, and Non-U.S. Residents week ending December 18, 2021 (Week 50)
Reporting Area Severe acute respiratory syndrome-associated coronavirus disease Shiga toxin-producing Escherichia coli (STEC) Shigellosis
Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †Current weekPrevious 52 weeks Max †Cum YTD 2021 †Cum YTD 2020 †
U.S. Residents, excluding U.S. Territories - 0 - - 53 478 10,096 9,172 73 351 7,693 8,571
New England - 0 - - - 15 284 263 1 12 281 220
Connecticut - 0 - - - 7 94 74 - 6 63 48
Maine - 0 - - - 3 22 11 - 2 6 3
Massachusetts - 0 - - - 7 103 89 1 7 157 122
New Hampshire - 0 - - - 2 20 21 - 3 8 8
Rhode Island - 0 - - - 4 39 27 - 4 45 32
Vermont - 0 - - - 1 6 41 - 1 2 7
Middle Atlantic - 0 - - 16 76 1,446 1,042 15 60 1,348 1,003
New Jersey - 0 - - - 3 10 30 - 14 224 167
New York (excluding New York City) - 0 - - 11 38 585 343 4 16 206 152
New York City - 0 - - 1 25 464 389 10 30 727 500
Pennsylvania - 0 - - 4 23 387 280 1 9 191 184
East North Central - 0 - - 1 51 1,193 1,301 1 22 556 700
Illinois - 0 - - - 19 329 345 - 14 242 234
Indiana - 0 - - - 4 17 130 - 2 4 55
Michigan - 0 - - - 6 1 197 - 3 4 146
Ohio - 0 - - - 18 444 347 - 11 211 198
Wisconsin - 0 - - 1 20 402 282 1 8 95 67
West North Central - 0 - - 3 66 1,202 1,452 1 21 230 335
Iowa - 0 - - - 30 458 358 - 7 60 62
Kansas - 0 - - - 15 171 161 - 8 42 17
Minnesota - 0 - - - 12 - 396 - 3 - 138
Missouri - 0 - - 2 11 241 248 - 6 60 60
Nebraska - 0 - - 1 12 187 147 1 4 51 36
North Dakota - 0 - - - 15 63 48 - 1 2 10
South Dakota - 0 - - - 6 82 94 - 2 15 12
South Atlantic - 0 - - 3 66 1,549 1,452 7 43 903 1,504
Delaware - 0 - - - 3 19 22 - 2 17 10
District of Columbia - 0 - - - 0 - 9 - 2 10 31
Florida - 0 - - - 22 504 416 2 30 477 527
Georgia - 0 - - 1 18 349 274 - 10 - 421
Maryland - 0 - - - 16 213 127 - 7 117 108
North Carolina - 0 - - - 10 107 248 - 6 73 199
South Carolina - 0 - - 1 4 77 77 - 4 45 64
Virginia - 0 - - 1 13 278 208 5 7 163 126
West Virginia - 0 - - - 2 2 71 - 1 1 18
East South Central - 0 - - - 33 555 514 1 12 247 588
Alabama - 0 - - - 7 134 99 1 5 82 345
Kentucky - 0 - - - 15 144 150 - 4 35 51
Mississippi - 0 - - - 1 2 37 - 3 12 53
Tennessee - 0 - - - 16 275 228 - 7 118 139
West South Central - 0 - - 14 71 1,007 707 12 42 651 1,657
Arkansas - 0 - - 3 8 109 70 3 3 19 31
Louisiana - 0 - - 4 6 67 76 2 5 73 172
Oklahoma - 0 - - 1 43 176 134 2 28 41 126
Texas - 0 - - 6 53 655 427 5 32 518 1,328
Mountain - 0 - - 5 61 1,246 1,005 12 33 838 658
Arizona - 0 - - 2 17 270 181 6 19 352 247
Colorado - 0 - - 3 28 467 281 3 14 211 214
Idaho - 0 - - - 5 56 144 - 4 28 19
Montana - 0 - - - 8 72 89 - 2 4 13
Nevada - 0 - - - 5 64 38 - 6 71 64
New Mexico - 0 - - - 5 39 37 3 9 111 52
Utah - 0 - - - 12 212 182 - 4 57 48
Wyoming - 0 - - - 5 66 53 - 1 4 1
Pacific - 0 - - 11 315 1,614 1,436 23 240 2,639 1,906
Alaska - 0 - - - 1 9 8 - 1 3 1
California - 0 - - 10 47 1,289 1,220 11 70 2,140 1,685
Hawaii - 0 - - - 2 5 6 - 3 25 40
Oregon - 0 - - 1 19 284 202 2 7 118 180
Washington - 0 - - - 308 27 - 10 225 353 -
U.S. Territories - 0 - - - 1 6 6 - 2 5 5
American Samoa - 0 - - - 0 - - - 0 - -
Commonwealth of Northern Mariana Islands - 0 - - - 0 - - - 0 - 1
Guam - 0 - - - 0 - - - 1 4 4
Puerto Rico - 0 - - - 1 6 6 - 1 1 -
U.S. Virgin Islands - 0 - - - 0 - - - 0 - -
Non-U.S. Residents - 0 - - - 0 - - - 0 - 2
Total - 0 - - 53 478 10,102 9,178 73 351 7,698 8,578
  • 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 2021 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://www.cdc.gov/nndss/docs/Readers-Guide-WONDER-Tables-20210421-508.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).
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.