Comparison of optimal allocations of vaccines with target vaccination in uncorrelated scale-free networks.

<p>Optimal allocation (a), (d), and (g) for (left column); optimal allocation (b), (e), and (h) for (center column); target allocation (c), (f), and (i) (right column). At equilibrium, the fractions of infected nodes are (), (), and (target vaccination), respectively. The total costs for the optimal allocation are (), (), ( for target vaccination), and ( for target vaccination). and the maximal vaccination coverage is . The degree distribution is generated with and the network size . The minimal degree is and the maximal degree is . Nodes are grouped into 30 groups.