Reply letter.

Dear Editors,

We thank Dr. Bettinger et al. for the clarification, and for providing valuable updates on the current epidemiology and surveillance of meningococcal disease in Canada. The objective of our review was to provide an overview of the epidemiology of meningococcal disease in North America during the last half century and portray how it has evolved over time, particularly in response to the different vaccination strategies employed by the US and Canada, rather than focus on the contemporary situation in each country.