Unknown fever stalks Kolkata in dengue season

An unknown fever, which has symptoms similar to dengue, has laid thousands low just when the civic body is walking the extra mile to keep vector-borne diseases in check this monsoon. At least two south Kolkata private hospitals have received a dozen patients each in July and are still treating several. There could be several undetected viruses or bacteria behind the spate of fever that have become difficult to detect, experts believe.

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