Figure 9 illustrates the dynamic evolution of average CP and infection counts over time across three risk strata, each consisting of 110 individuals: high-risk, medium-risk, and low-risk. These risk levels are encoded using distinct values of the susceptibility and transmissibility parameters (αu, βu), where high-risk individuals are assigned αu = 0.8 and βu = 2, medium-risk individuals αu = 0.2 and βu = 1.25, and low-risk individuals αu = 0.05 and βu = 0.5. This evidence concerns the gene CP and infection.