Dengue Is Deadlier That It Used To Be, According to History

Dengue fever has existed for more than 300 years. During most of that time, it was described as unpleasant, but seldom a deadly disease. However, once a lethal variant called dengue haemorrhagic fever or DHF appeared in the 1950s, the intensity, frequency and deadliness of the disease outbreaks have started.

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