Confirming past hypotheses, they found that both deforestation and afforestation had significant correlations to disease outbreaks. They found a strong association between deforestation and epidemics (such as malaria and Ebola) in tropical countries like Brazil, Peru, Bolivia, the Democratic Republic of Congo, Cameroon, Indonesia, Myanmar and Malaysia. In contrast, temperate regions like the USA, China and Europe showed clear links between afforestation activities and vector-borne diseases like Lyme disease.
Their approach did not distinguish between different types of reforestation activities, but they did find a significant increase in disease outbreaks in countries with expanding palm oil plantations. This was especially striking in regions of China and Thailand, where there was relatively little deforestation. These areas appeared particularly susceptible to mosquito-borne diseases like dengue, zika and yellow fever.
Source: Deforestation, forest conversion and palm oil | EurekAlert!
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