Fig. 3

Contact-adjusted immunity in different theoretical scenarios, with age-specific mixing as measured in diary studies. Each column represents one of the scenarios of age-specific immunity (top), with differences between the settings given by their different mixing patterns. Scenarios from left to right: a Current target levels. b 5% higher immunity in under 5-year-olds. c 5% higher immunity in 5–9-year-olds. d 5% lower immunity in 10–14-year-olds. e 5% higher immunity in 5–9-year-olds and 5% lower immunity in 15–19-year-olds