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Number of blood smears examined for malaria by case surveillance strategies during the period 2017–2019 and the yield of positives from each strategy. The number of blood smears examined for malaria by case surveillance strategies, PCD (blue), RACD (green), and PACD (ochre) (columns) during 2017, 2018 and 2019 and the yield of positives per 100,000 smears (dots) from each strategy in each year
