West Nile virus is most commonly spread through the bite of an infected mosquito.
Mandatory Credit: Jon Cherry/Getty Images/FILE via CNN Newsource
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What to know about West Nile virus, the illness that sickened Dr. Anthony Fauci
When Dr. Anthony Fauci became infected with West Nile virus, a mosquito-borne disease, it was so severe that he had to be hospitalized.
