Figure 4 | Scientific Reports

Figure 4

From: Travel risk, malaria importation and malaria transmission in Zanzibar

Figure 4

Quantitative assessment of malaria importation.

Vulnerability (the number of imported malaria per year per 1,000 inhabitants, δ) and receptivity (the effective reproductive number, Rc ) in three different epidemiological settings in Zanzibar: (a) urban Unguja with a parasite rate of 0% (95% Confidence Interval: 0–0.2%), (b) rural Unguja with a parasite rate of 0.5% (0.3–0.9) and (c) Pemba with a parasite rate of 1.5% (1–2.1). The solid black line represents the mean annual number of imported malaria cases and the dashed black lines the upper and lower bounds of the 95% confidence interval represented by the grey area. The red dotted line represents the empirical estimation of δ in Zanzibar according to travel assessment survey, which is of 1.6 imported malaria cases per 1,000 inhabitants per year.

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