West Nile Virus — Pakistan
Experts studying the West Nile virus (WNV) in Punjab have seen it show up in 3 blood donors, raising worries the infection is going undetected in transfusions.
The WNV is a mosquito-borne virus. It has strains from up to 9 lineages. Of these, lineages 1, 2, and 5 have been linked to encephalitis or brain inflammation outbreaks in humans. Roughly one in 150 infections leads to encephalitis or brain inflammation.
The Pakistani virus was discovered to be lineage 1, along with other highly
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