Echovirus Ab^1st specimen:PrThr:Pt:Ser:Ord
echovirus ab^1st specimen:prthr:pt:ser:ord
Echovirus Antibody^1st specimen:Presence or Threshold:To identify measures at a point in time:Serum:Ordinal
echovirus antibody^1st specimen:presence or threshold:to identify measures at a point in time:serum:ordinal