Fig. 2: Easter break 2021.
From: Assessing the role of children in the COVID-19 pandemic in Belgium using perturbation analysis
Age-specific cumulative sensitivity (\({\tilde{s}}_{j,t}\)) and elasticity (\({\tilde{e}}_{j,t}\)) values are visualised at times t = 18, 20, 21. These correspond to different phases: (a) before the Easter Pause, (b) during the Easter Pause, (c) upon control measures relaxation. The quadrants---Main, Incidental, Effective, and Marginal---reflect the various roles in virus transmission based on cumulative sensitivity and elasticity values. The size of the dots represents the infective value vj,t, which averages 0.92 over the observation period.
