Time when receiving vaccines given in the four first vaccination visits for each site presented with inverse and cumulative Kaplan-Meier plots . In the first vaccination visit, an oral polio vaccine (polio0) is given together with the BCG vaccine, in the second, third and fourth vaccination visits, pentavalent vaccines are given together with polio vaccines. (Larger versions of the graph images are available as additional files 3, 4, 5, 6, 7, 8, 9 and10.) 1 The blue vertical lines indicate the recommended age for vaccination (overlapping with red lines at birth for BCG and first polio vaccine), while the red lines indicate the outer ranges for the recommended age. The horizontal dotted lines represent coverage at end of follow-up. 2 The labels on the x-axis indicate the outer ranges for recommended vaccination age. One year of age is indicated as a scaling, but is also the upper recommended age for the measles vaccine. 3 Blue graphs line: Paarl; green graph line: Umlazi; red graph line: Rietvlei.