Pertussis Infection Trends in the US and UK (image) Santa Fe Institute Share Print E-Mail Caption Pertussis cases in the United States from 1922 through 2012 and in the UK from 1940 through 2013. Shaded regions correspond to the pre-vaccine era, the DTP era, and the DTaP era, respectively. Credit Courtesy of B. Althouse and S. Scarpino Usage Restrictions Credit to the Santa Fe Institute Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.