The timeline shown below provides information regarding the approximate length of each stage of pertussis infection and the recommended laboratory testing during each interval. 7. Centers for Disease Control and Prevention. Manual for the surveillance of vaccine-preventable diseases-- Chapter 10: Pertussis. Available at: http://www.cdc.gov/vaccines/pubs/surv-manual/chpt10-pertussis.html. Accessed August 10, 2022.