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The main symptoms of West Nile infection are headache, fever, muscle aches, dizziness and loss of memory.
West Nile Fever is a mosquito-borne zoonotic disease and is related to viruses that cause Japanese encephalitis, yellow fever and St Louis encephalitis.
The virus is transmitted to humans through a mosquito bite and is mostly reported in North America.
The first set of samples from a 24-year-old woman turned positive, after tests from the National Institute of Virology, Pune.