No pneumococcal vax are live
There are 2 funded by YourGov: The 13 Valent and the 23 Valent
The 13V one is the one for Nonindigenous >70 and the 23V is for indigenous >50. Why not just one type ? I don't know - possibly cost?
The 13V is a conjugate meaning that a little bit of the polysaccharide bits of cell wall is bound to a carrier protein
The 23V is a polysaccharide meaning just a little bit of polysaccharide Components of the cell wall not conjugated to anything.
Nothing special between conjugate or polysaccharide as far as I know - it's just how it's made.