Head epidemiologist admits pertussis spreads among the vaccinated

Head epidemiologist admits pertussis spreads among the vaccinated
Why hasn’t vaccination wiped pertussis out?
You can be immunized and protected against getting the disease, pertussis, but still have the organism in your nose and throat and spread it to others. Or you can have a very mild illness that is caused by pertussis that causes you to cough, and thereby infect others. So the immunity is not 100 percent from the pertussis vaccine. And what it means is any kind of herd immunity—the way we see, for example, much more powerfully with measles

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