Table 2.

Illness severity versus known immunization status of all patients: Only cases with a diagnosis of probable or confirmed pertussis and those with a prolonged cough of more than 2 weeks were included in this analysis.

ILLNESS SEVERITY AND TOTALIMMUNIZATION STATUS OF ALL PATIENTS, N
IMMUNIZEDNOT IMMUNIZEDPARTIAL OR UNKNOWNTOTAL
Classic4921878
Atypical or mild101213
Total59221091