paired sera from 20 humans with eastern equine encephalitis ( eee ) virus infections and from 17 humans with western equine encephalitis ( wee ) virus infections , all with previously demonstrated fourfold or greater rises or falls in hemagglutination-inhibiting , complement-fixing , or neutralizing antibody titers , were tested for immunoglobulin m ( igm ) and igg antibodies by an enzyme immunoassay .
C0229671
sera
C0009498
complement