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New study disproves suspicion that dengue raises risk of zika-related microcephaly

New study disproves suspicion that dengue raises risk of zika-related microcephaly A pregnant woman infected by zika virus does not face a greater risk of giving birth to a baby with microcephaly if she has previously been exposed to dengue virus, according to a Brazilian study that compared data for pregnant women in Rio de Janeiro and Manaus. A zika epidemic broke out in Brazil in 2015-16 in areas where dengue is endemic. Both viruses are transmitted by the mosquito Aedes aegypti. Some of the states affected by the zika epidemic reported a rise in cases of microcephaly, a rare neurological disorder in which the baby s brain fails to develop completely. Others saw no such rise.

Researchers develop models to predict epidemics of yellow fever, other mosquito-borne diseases

Models to predict dengue, zika and yellow fever outbreaks are developed by researchers

 E-Mail IMAGE: Monkey being examined in Manaus area. Scientists will monitor areas in which these diseases are endemic to investigate the factors that trigger outbreaks view more  Credit: CREATE-NEO By Maria Fernanda Ziegler | Agência FAPESP – Yellow fever was the first human disease to have a licensed vaccine and has long been considered important to an understanding of how epidemics happen and should be combated. It was introduced to the Americas in the seventeenth century, and high death rates have resulted from successive outbreaks since then. Epidemics of yellow fever were associated with the slave trade, the US gold rush and settlement of the Old West, the Haitian Revolution, and construction of the Panama Canal, to cite only a few examples.

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