El informe del Programa de Medio Ambiente de las Naciones Unidas (UNEP) indica que el incremento de los casos de malaria y dengue, así como la reciente transmisión a seres humanos de virus como el Nipah, están relacionados con cambios mediambientales que favorecen la propagación de estas enfermedades.
La deforestación, la extensión del medio urbano sin planificación, el mal manejo de la pobreza, la contaminación, la construcción de carreteras y diques y el aumento de las temperaturas se citan como factores agravantes.
Los autores del documento recuerdan que las enfermedades infecciosas causan anualmente en el mundo 15 millones de muertes, lo que representa una cuarta parte de la mortalidad global. En zonas como el Sudeste Asiático o África, representan dos tercios de todas las defunciones, afectando en su mayor parte a niños y adultos jóvenes.
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