A new study shows that four out of five children who get the contagious disease – were actually vaccinated for it.
Researchers concluded that the Whooping Cough vaccine becomes less effective as kids begin to age.
Despite these results – study authors reiterated the importance of getting the vaccine as a means of prevention.
The Centers for Disease Control and Prevention (CDC) recommends babies get a series of shots with a combination vaccine beginning at two months of age.
They also recommend adults get a booster shot every ten years.