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Dengue Fever Vaccine Could Cause Severe Illness

The first vaccine marketed to prevent dengue fever could be making people sick, according to a new study. The authors are urging public health officials to consider carefully which individuals to vaccinate, to prevent severe illness. An estimated 400 million people globally are infected each year with dengue fever, a mosquito-borne virus found most often in tropical regions. People who live in dengue-prone areas frequently are infected more than once, but most suffer relatively mild...


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