Fig. 1From: Strengthening routine immunization in Papua New Guinea: a cross-sectional provincial assessment of front-line servicesHealth worker practices assessed against the WHO Immunization Session Checklist (percentage of provider-client interactions showing the practice). Note: Structured observation of 11 immunization sessions, using the 2015 WHO Immunization Session Checklist [15], which aims to avoid the most common programmatic errors reported by senior immunization managers in a WHO consultation. VVM = vaccine vial monitor, AD = Autodisable, BF = Breast-feedingBack to article page