8 doctors weighed in:
What causes pertussis infections if people are already vaccinated?
8 doctors weighed in

Dr. James Ferguson
Pediatrics
5 doctors agree
In brief: Waning immunity
Pertussis & most other bacterial vaccines (meningitis, diptheria, tetanus, etc.
) give the body a time limited period of benefit. By 6-10 years after the last vaccine, the decrease allows people to develop symptomatic disease & or pass it to others. Since pertussis is more a chronic cough with teens & adults, some may never know they have it.

In brief: Waning immunity
Pertussis & most other bacterial vaccines (meningitis, diptheria, tetanus, etc.
) give the body a time limited period of benefit. By 6-10 years after the last vaccine, the decrease allows people to develop symptomatic disease & or pass it to others. Since pertussis is more a chronic cough with teens & adults, some may never know they have it.
Dr. James Ferguson
Dr. James Ferguson
Thank
Dr. Carla Enriquez
Pediatrics
1 doctor agrees
In brief: And...
Dr ferguson is quite correct.
Also, there are several species of bacteria & viruses that cause a "pertussis-like" syndrome, but are not pertussis. These conditions are not as serious as actual pertussis, and are not vaccinated against.

In brief: And...
Dr ferguson is quite correct.
Also, there are several species of bacteria & viruses that cause a "pertussis-like" syndrome, but are not pertussis. These conditions are not as serious as actual pertussis, and are not vaccinated against.
Dr. Carla Enriquez
Dr. Carla Enriquez
Thank
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