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 1l. Weekly cases* of notifiable diseases, United States, U.S. Territories, and Non-U.S. Residents week ending January 1, 2022 (Week 52)
Reporting Area Ehrlichiosis and Anaplasmosis Giardiasis
Ehrlichia ewingii infection Undetermined ehrlichiosis/anaplasmosis
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 - 2 8 19 - 13 115 50 69 325 9,721 9,143
New England - 0 - - - 2 5 2 10 31 743 657
Connecticut N NC N N N NC N N - 8 104 132
Maine - 0 - - - 0 - 2 4 8 137 139
Massachusetts - 0 - - - 2 4 - 6 17 372 272
New Hampshire - 0 - - - 1 1 - - 8 76 83
Rhode Island - 0 - - - 0 - - - 6 54 31
Vermont - 0 - - - 0 - - N NC N N
Middle Atlantic - 2 3 3 - 11 83 5 30 81 2,459 2,002
New Jersey - 0 - 3 - 0 - - - 11 270 207
New York (excluding New York City) - 2 3 - - 1 6 4 19 45 927 745
New York City - 0 - - - 1 2 - 11 29 809 661
Pennsylvania - 0 - - - 11 75 1 - 22 453 389
East North Central - 1 2 3 - 2 15 13 2 60 1,105 1,263
Illinois - 0 - - - 1 1 1 N NC N N
Indiana - 1 1 3 - 0 - - - 2 1 141
Michigan - 0 - - - 1 1 - 1 14 334 371
Ohio - 0 - - - 0 - - - 44 296 268
Wisconsin - 1 1 - - 2 13 12 1 31 474 483
West North Central - 0 - 6 - 1 5 18 1 20 597 1,012
Iowa - 0 - - - 0 - - - 8 152 146
Kansas - 0 - - - 1 1 - - 8 75 104
Minnesota - 0 - - - 0 - - - 5 - 414
Missouri - 0 - 6 - 0 - 18 - 8 186 148
Nebraska - 0 - - - 0 - - 1 4 75 78
North Dakota - 0 - - - 1 1 - - 4 42 57
South Dakota - 0 - - - 1 3 - - 8 67 65
South Atlantic - 1 1 4 - 1 4 6 2 42 1,290 1,353
Delaware - 0 - 1 - 0 - - - 2 31 24
District of Columbia - 0 - - - 0 - - - 1 4 23
Florida - 0 - 1 - 0 - - - 33 638 644
Georgia - 0 - - - 0 - - - 8 83 219
Maryland - 1 1 1 - 0 - - - 7 119 92
North Carolina - 0 - - - 0 - - N NC N N
South Carolina - 0 - - - 1 3 6 - 8 136 117
Virginia - 0 - 1 - 0 - - 2 11 250 151
West Virginia - 0 - - - 1 1 - - 3 29 83
East South Central - 1 2 - - 1 1 3 1 7 160 129
Alabama - 0 - - - 0 - - 1 7 160 129
Kentucky - 1 1 - - 0 - 2 N NC N N
Mississippi - 0 - - - 0 - - N NC N N
Tennessee - 1 1 - - 1 1 1 N NC N N
West South Central - 0 - 3 - 0 - - - 21 335 249
Arkansas - 0 - 3 - 0 - - - 10 137 83
Louisiana - 0 - - - 0 - - - 16 198 166
Oklahoma - 0 - - - 0 - - N NC N N
Texas - 0 - - - 0 - - N NC N N
Mountain - 0 - - - 0 - - 11 37 998 887
Arizona - 0 - - - 0 - - - 8 82 84
Colorado N NC N N N NC N N 10 18 423 333
Idaho N NC N N N NC N N - 6 120 112
Montana - 0 - - - 0 - - - 3 53 74
Nevada - 0 - - - 0 - - - 4 60 51
New Mexico N NC N N N NC N N - 3 27 46
Utah - 0 - - - 0 - - 1 9 209 155
Wyoming - 0 - - - 0 - - - 2 24 32
Pacific - 0 - - - 1 2 3 12 200 2,034 1,591
Alaska N NC N N N NC N N - 6 57 87
California - 0 - - - 0 - 1 9 51 1,446 1,226
Hawaii N NC N N N NC N N - 2 20 26
Oregon - 0 - - - 1 2 2 3 14 335 252
Washington - 0 - - - 0 - - - 184 176 -
U.S. Territories - 0 - - - 0 - - - 2 20 42
American Samoa N NC N N N NC N N - 0 - -
Commonwealth of Northern Mariana Islands - 0 - - - 0 - - - 0 - 1
Guam N NC N N N NC N N - 0 - 1
Puerto Rico N NC N N N NC N N - 2 20 40
U.S. Virgin Islands - 0 - - - 0 - - - 0 - -
Non-U.S. Residents - 0 - - - 0 - - - 1 3 5
Total - 2 8 19 - 13 115 50 69 326 9,744 9,190
  • 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.