title: Pertussis cases still are increasing in Michigan.
mesh_terms: D016358:Contact Tracing; D006801:Humans; D008824:Michigan / Q000453:epidemiology; D010567:Pertussis Vaccine / Q000008:administration & dosage; D014917:Whooping Cough / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control
chemical_list: D010567:Pertussis Vaccine