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Kenya is a lower middle-income country located in East Africa. The coastal areas have year-round tropical weather that is mainly humid between April and May. One year, there was a period of heavy rain in December, which led to flooding of villages. A Kenyan community health worker reported that more than 400 people in a village had a flu-like illness. Most of them complained of fever, body aches, tiredness and dizziness. Many of the sick villagers felt better within the week; however, more than 100 had high fever, blindness and seizures. Those who remained sick were hospitalised, and most of them either went into a coma or died. The cases were reported to the Kenyan Ministry of Health which deployed a public health team to work with the World Health Organization on the situation. The public health team interviewed the villagers to find out what the patients had in common. Most of the sick people were farmers, herdsmen and housewives. It was also reported that hundreds of sheep had died or were showing signs of sickness.
In this outbreak, there were 404 sick villagers, of whom 115 were hospitalised and 118 unfortunately died. Define ‘case fatality rate’ (CFR) then calculate the CFR for this outbreak. Show your working and round the answer to three decimal places.
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