By Marie Rosenthal
A recent Zika virus case in Utah has public health officials scratching their heads because they are not sure how the virus was transmitted. A family member who cared for an elderly patient who died of Zika in June came down with the illness, but did not have any of the likely exposures: travel to an endemic area, history of sexual contact with a Zika-infected person, or mosquito exposure (the mosquitoes that transmit the virus are not normally present in Utah).
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