Fig. 5

Optimal vaccine allocation between social groups required to control disease inequalities in a influenza and b rubella. Results shown for ratio of contact rate in social groups (χ = 0.65–0.95) and ratio of susceptibility in social groups (η = 0.65–0.95). The total vaccination coverage is 80% of the critical vaccination threshold (37% vaccine uptake for influenza, 67% vaccine uptake for rubella)