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Number of flights per month from Luanda to other African destinations with monthly climatic suitability for Zika virus transmission in passenger-receiving cities. Axes labels show climatic suitability and flight passenger numbers tailored to each location independently to illustrate seasonality and inter-annual variation. Addis Ababa, Cape Town, Johannesburg, Nairobi, and Windhoek have considerably higher numbers of travellers arriving from Angola.
