Postpone vaccination in subjects suffering from acute severe febrile illness. Do not administer intravascularly. Appropriate medical treatment & supervision should always be readily available in case of rare anaphylactic reactions following the administration of the vaccine. If any of the following occurs, the decision to give doses of pertussis-containing vaccine should be carefully considered: Temp ≥40°C w/in 48 hr, not due to another identifiable cause; collapse or shock-like state w/in 48 hr of vaccination; persistent, inconsolable crying lasting ≥3 hr, w/in 48 hr of vaccination; convulsions w/ or w/o fever, w/in 3 days of vaccination. Childn w/ new onset or progressive severe neurological disorders; individuals w/ thrombocytopenia or a bleeding disorder; immunosuppressed patients. Protective immune response may not be elicited in all vaccinees. Lactation.