Influenza virus B Ab^1st specimen:Titr:Pt:Ser:SemiQn:Comp fix
influenza virus b ab^1st specimen:titr:pt:ser:semiqn:comp fix
Influenza virus B Ab [Titer] in Serum by Complement fixation --1st specimen
influenza virus b ab [titer] in serum by complement fixation --1st specimen