The vaccine for whooping cough doesn’t work as well as it used to, and new research suggests it’s largely because the bacteria behind the disease has mutated.
. Nearly all children who receive all five recommended doses are protected for one year. After that, immunity wanes. Five years after the last dose, the CDC says the DTaP protects only about 70 percent of children from pertussis.Babies are not eligible for the DTaP vaccine until they’re 2 months old. The CDC advises women to get a booster shot with every pregnancy so babies are born with some protection against whooping cough until they’re old enough to get the vaccine themselves.
Paradoxically, many babies with whooping cough may not cough at all. They may simply stop breathing, leading to dangerous and life-threatening situations.About half of babies under age 1 with pertussis are hospitalized, often because they have trouble breathing, according to the CDC. Of those hospitalized, a quarter develop pneumonia. One out of 100 will die.
Whooping cough is different. Infectious disease experts attribute the rise in pertussis cases in part to better diagnostic testing, but also to waning immunity. The mostPertussis is no ordinary cough. The intense hacking associated with the infection inspired its two nicknames: “cough of 100 days” for its propensity to linger for weeks, and “whooping cough” for the sound of patients urgently gasping for air after violent coughing fits.
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