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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: World Wide Web. 2018 Jun 14;22(6):2997–3020. doi: 10.1007/s11280-018-0608-8

Fig. 4.

Fig. 4

Net return per capita (NRPC), per dollar spent (NRPD), and per vaccinated person (NRPV). The bar height represents value of net return within each one. Each total net return (blue + red) is the sum of indirect net return (upper blue bar) and direct net return (lower red bar). Indirect net returns are significantly larger than direct net returns across all age groups.