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 1k. 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
Anaplasma phagocytophilum infection Ehrlichia chaffeensis infection
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 18 436 5,749 3,543 2 65 927 1,173
New England 1 150 1,940 1,707 - 4 29 62
Connecticut - 10 56 115 - 2 6 7
Maine - 60 832 442 - 1 3 2
Massachusetts 1 85 742 739 - 1 4 25
New Hampshire - 18 182 137 - 1 2 5
Rhode Island - 15 123 88 - 3 14 18
Vermont - 2 5 186 - 0 - 5
Middle Atlantic 17 256 3,130 1,385 1 14 170 122
New Jersey - 16 163 115 - 5 46 78
New York (excluding New York City) 17 179 2,152 972 1 14 110 27
New York City - 15 112 108 - 1 7 16
Pennsylvania - 62 703 190 - 1 7 1
East North Central - 46 526 367 - 12 113 114
Illinois - 5 23 15 - 4 28 30
Indiana - 1 5 - - 4 39 47
Michigan - 7 43 17 - 3 6 1
Ohio - 1 3 1 - 2 8 19
Wisconsin - 39 452 334 - 4 32 17
West North Central - 5 26 20 - 5 61 262
Iowa - 3 11 7 - 3 10 2
Kansas - 1 2 - - 5 33 33
Minnesota - 0 - - - 0 - -
Missouri - 1 3 2 - 4 11 219
Nebraska - 1 1 - - 2 7 8
North Dakota - 3 9 9 - 0 - -
South Dakota - 0 - 2 - 0 - -
South Atlantic - 7 76 38 - 30 312 293
Delaware - 1 7 5 - 4 26 28
District of Columbia - 0 - - - 1 1 1
Florida - 2 20 6 - 2 26 8
Georgia - 1 1 - - 2 8 8
Maryland - 5 22 6 - 8 61 54
North Carolina - 2 8 7 - 14 118 104
South Carolina - 0 - - - 0 - -
Virginia - 3 17 12 - 7 63 87
West Virginia - 1 1 2 - 3 9 3
East South Central - 3 20 7 - 13 156 143
Alabama - 2 11 2 - 4 13 10
Kentucky - 1 2 - - 8 45 63
Mississippi - 0 - 1 - 1 1 5
Tennessee - 3 7 4 - 8 97 65
West South Central - 1 12 12 - 10 83 176
Arkansas - 1 8 11 - 10 78 167
Louisiana - 1 1 - - 0 - 1
Oklahoma - 1 - - - 1 1 -
Texas - 1 3 1 - 1 4 8
Mountain - 1 3 - 1 1 3 1
Arizona - 1 2 - 1 0 1 -
Colorado N NC N N N NC N N
Idaho N NC N N N NC N N
Montana - 1 1 - - 1 2 -
Nevada - 0 - - - 0 - -
New Mexico N NC N N N NC N N
Utah - 0 - - - 0 - -
Wyoming - 0 - - - 0 - 1
Pacific - 3 16 7 - 1 - -
Alaska N NC N N N NC N N
California - 3 12 7 - 0 - -
Hawaii N NC N N N NC N N
Oregon - 1 3 - - 0 - -
Washington - 1 1 - - 1 - -
U.S. Territories - 0 - - - 0 - -
American Samoa N NC N N N NC N N
Commonwealth of Northern Mariana Islands - 0 - - - 0 - -
Guam N NC N N N NC N N
Puerto Rico N NC N N N NC N N
U.S. Virgin Islands - 0 - - - 0 - -
Non-U.S. Residents - 0 - - - 0 - -
Total 18 436 5,749 3,543 2 65 927 1,173
  • 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).