Mice injected with a purified structural protein from the West Nile virus (WNV) develop immunity against infection, new research shows.The findings suggest WNV-like particles could be used as a vaccine, Dr. T. Jake Liang of the National Institutes of Health in Bethesda, Maryland, and colleagues report in the Journal of Infectious Disease.Because the particles are produced using genetic engineering techniques, the researchers note, they avoid the risks of some other WNV vaccine candidates.
