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 2012 2013 2014 2015 2016 5-yr Median 2017-Q4*
Diphtheria 0 0 0 0 0 0 0
Haemophilus Influenzae 26 26 34 33 45 33 49
Hepatitis B            
  Acute 15 23 7 13 9 13 1
  Chronic 267 371 371 321 258 321 231
Measles 0 5 0 14 0 0 0
Mumps 4 4 12 22 39 12 39
Pertussis (Whooping Cough) 461 143 186 171 196 186 118
Pneumococcal Disease (Invasive)¶ 7 8 9 8 7 8 10
Rubella 0 0 1 0 0 0 0
Tetanus 1 0 0 0 1 0 0
Varicella 123 99 85 63 73 85 68
Selected Communicable Diseases
Campylobacteriosis¶¶ 308 333
Cryptosporidiosis 8 23 23 10 36 23 38
E.coli O157:H7 18 11 8 8 30 11 7
Hepatitis A 6 20 9 12 7 9 12
Hepatitis C 863 801 950 962 936 936 1051
Histoplasmosis 20 20 21 22 34 21 37
Legionnaires' Disease 51 73 69 47 69 69 75
Listeriosis 4 11 5 13 10 10 8
Lyme Disease 36 42 33 41 51 41 56
Malaria 7 15 15 13 17 15 12
Meningococcal Disease 3 0 3 1 2 2 2
Salmonellosis 310 311 314 314 312 312 299
Shigellosis 52 49 144 94 66 66 52
Streptococcal Invasive (Group A) 69 65 60 56 58 60 49
Tuberculosis  89 78 64 85 83 83 86
Typhoid Fever 2 4 3 11 8 4 5
West Nile Virus (Neuroinvasive) 61 15 10 4 24 15 20
Sexually Transmitted Infections
Chlamydia 8,820 8,977 9,384 9,760 10,456 9,384 **
Gonorrhea 2,081 2,009 1,928 2,128 2,555 2,081 **
HIV (not AIDS) 174 154 187 201 225 187 **
AIDS 86 92 79 78 81 81 **
Syphilis§ 91 65 69 146 189 91 **

Except for tuberculosis, excludes Evanston, Oak Park, Skokie and Stickney Township
* Provisional cases through the fourth quarter of 2017
† 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