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-Q1*
Diphtheria 0 0 0 0 0 0 0
Haemophilus Influenzae 26 26 34 33 45 33 7
Hepatitis B            
  Acute 15 23 7 13 10 13 0
  Chronic 267 371 371 321 258 321 13
Measles 0 5 0 14 0 0 0
Mumps 4 4 12 22 40 12 22
Pertussis (Whooping Cough) 461 143 186 171 193 186 23
Pneumococcal Disease (Invasive)¶ 7 8 9 8 7 8 1
Rubella 0 0 1 0 0 0 0
Tetanus 1 0 0 0 1 0 0
Varicella 123 99 85 63 73 85 15
Selected Communicable Diseases
Campylobacteriosis¶¶ 308 55
Cryptosporidiosis 8 23 23 10 36 23 6
E.coli O157:H7 18 11 8 8 30 11 1
Hepatitis A 6 20 9 12 7 9 5
Hepatitis C 863 801 950 962 930 930 208
Histoplasmosis 20 20 21 22 34 21 6
Legionnaires' Disease 51 73 69 47 70 69 5
Listeriosis 4 11 5 13 10 10 1
Lyme Disease 36 42 33 41 51 41 1
Malaria 7 15 15 13 17 15 2
Meningococcal Disease 3 0 3 1 2 2 0
Salmonellosis 310 311 314 314 313 313 33
Shigellosis 52 49 144 94 66 66 8
Streptococcal Invasive (Group A) 69 65 60 56 57 60 11
Tuberculosis  89 78 64 85 83 83 13
Typhoid Fever 2 4 3 8 8 4 0
West Nile Virus (Neuroinvasive) 61 15 10 4 23 15 0
Sexually Transmitted Infections
Chlamydia 8,820 8,977 9,384 9,760 ** 9,181 **
Gonorrhea 2,081 2,009 1,928 2,128 ** 2,045 **
HIV (not AIDS) 174 154 187 201 ** 181 **
AIDS 86 92 79 78 ** 83 **
Syphilis§ 91 65 69 146 ** 80 **

Except for tuberculosis, excludes Evanston, Oak Park, Skokie and Stickney Township
* Provisional cases through the first 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