VPD Surveillance Manual, Chapter 1 VPD Surveillance Manual, Chapter 1 VPD Surveillance Manual, Chapter 1 http://www.cdc.gov/vaccines/pubs/surv-manual/chpt01-dip.html VPD Surveillance Manual, Chapter 1 http://www.cdc.gov/vaccines/pubs/surv-manual/chpt01-dip.html VPD Surveillance Manual, Chapter 1 VPD Surveillance Manual, Chapter 1