Figure 4.

Initial breakthrough SARS-CoV-2 spike-binding antibody titers are influenced by the interval since second dose primary series vaccination. Levels of anti-SARS-CoV-2 spike-binding antibodies by time since second dose of primary series vaccination. The bottom and top edges of the box indicate the first and third quartiles, the difference is the IQR, the line inside the box is the median, and the marker inside the box is the mean. The whiskers that extend from the box indicate the minimum and maximum after removing outliers (i.e., datapoints >1.5 x IQR from the box).