Nairobi sheep disease virus Ab:PrThr:Pt:Ser:Ord
nairobi sheep disease virus ab:prthr:pt:ser:ord
Nairobi sheep disease virus Antibody:Presence or Threshold:To identify measures at a point in time:Serum:Ordinal
nairobi sheep disease virus antibody:presence or threshold:to identify measures at a point in time:serum:ordinal