Streptococcus pneumoniae 12 Ab^2nd specimen/1st specimen:Ratio:Pt:Ser:Qn
streptococcus pneumoniae 12 ab^2nd specimen/1st specimen:ratio:pt:ser:qn
Streptococcus pneumoniae 12 Ab^2nd specimen/1st specimen:Ratio:Pt:Ser:Qn
streptococcus pneumoniae 12 ab^2nd specimen/1st specimen:ratio:pt:ser:qn