The issue focused on the post-antibiotic era, in which the human body is more vulnerable to many common diseases, and the second was the number of years of life lost to human disease, in the last 20 years.

Raban, A.J. and D.C. O'Connell. (2013) "Pertussis: A health care system's cost: A case study of the US." The American Journal of Public Health, 105(2), e6-e