Communicable disease case counts are shown below for vaccine preventable diseases, selected communicable diseases, and sexually transmitted infections in suburban Cook County. Case counts are provided quarterly for the current year only.

Vaccine Preventable Diseases 2011 2012 2013 2014 2015 5-yr Median 2016-Q4*
Diphtheria 0 0 0 0 0 0 0
Haemophilus Influenzae 23 26 26 34 33 26 40
Hepatitis B            
  Acute 24 15 23 7 13 15 10
  Chronic 315 267 371 371 321 321 238
Measles 1 0 5 0 14 1 0
Mumps 2 4 4 12 22 4 40
Pertussis (Whooping Cough) 280 461 143 186 171 186 177
Pneumococcal Disease (Invasive)¶ 9 7 8 9 8 8 6
Rubella 0 0 0 1 0 0 0
Tetanus 0 1 0 0 0 0 1
Varicella 137 123 99 85 63 99 71
Selected Communicable Diseases
Campylobacteriosis¶¶ 285
Cryptosporidiosis 17 8 23 23 10 17 32
E.coli O157:H7 16 18 11 8 8 11 21
Hepatitis A 6 6 20 9 12 9 7
Hepatitis C 920 862 802 956 955 920 871
Histoplasmosis 12 20 20 21 22 20 27
Legionnaires' Disease 27 51 73 69 47 51 52
Listeriosis 6 4 11 5 13 6 7
Lyme Disease 31 36 42 33 41 36 47
Malaria 19 7 15 15 13 15 17
Meningococcal Disease 3 3 0 3 1 3 1
Salmonellosis 260 310 311 314 314 311 238
Shigellosis 60 52 49 144 94 60 62
Streptococcal Invasive (Group A) 49 69 65 60 54 60 49
Tuberculosis  75 89 78 64 85 78 83
Typhoid Fever 8 2 4 3 8 4 6
West Nile Virus (Neuroinvasive) 10 61 15 10 4 10 23
Sexually Transmitted Infections
Chlamydia 8,403 8,820 8,977 9,384 9,760 8,977 **
Gonorrhea 2,071 2,081 2,009 1,928 2,128 2,071 **
HIV (not AIDS) 166 174 154 187 201 174 **
AIDS 58 86 92 79 78 79 **
Syphilis§ 91 91 65 69 146 90 **

Except for tuberculosis, excludes Evanston, Oak Park, Skokie and Stickney Township
* Provisional cases through the fourth quarter of 2016
† Includes type B
¶ As of March 2008, reportable only in those < 5 years of age
¶¶ Reportable beginning April 2016
§ Primary and secondary syphilis
** Due to reporting lags, data are not available