Does El Niño Cause Dengue Fever? Deadly Epidemics Linked To Changing Climate And Weather Patterns

Every two five years, dengue fever rages in tropical regions. This year, a particularly bad outbreak in India has struck more than 1,800 people in recent weeks, killing five. Officials are unsure why this year's outbreak has been so much worse than others and many wonder why dengue outbreaks seem to happen in cycles. Now, researchers at the National Institutes of Health may have found a clue: the weather phenomenon known as El Niño.

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