Within two weeks, the cough becomes more severe and is characterized by episodes of numerous rapid coughs followed by a crowing or high pitched whoop. A thick, clear mucous may be discharged. These episodes may recur for one to two months, and are more frequent at night. Older people or partially immunized children generally have milder symptoms. The New York State Health Department fact sheet answers some common questions about Pertussis.
Cases are subject to restrictions on school attendance , day care attendance , and patient care .
Childhood immunization is recommended.