Erratum to: The estimated incidence of pertussis in people aged 50 years old or older in the United States, 2006–2010

Erratum

After publication of the original article [1], it came to the authors’ attention that the title had been incorrectly published as The estimated incidence of pertussis in people aged 50 years old in the United States, 2006–2010.

“50 years old” should have read as “50 years or older”, so the title should have read: The estimated incidence of pertussis in people aged 50 years old or older in the United States, 2006–2010. The correct title of the original article appears in this erratum.