PCV13 and PCV7 are manufactured in a similar fashion and PCV13 will replace PCV7 for prevention of pneumococcal disease in children. Because PCV7 has been used since 2000 there is now significantly less pneumococcal disease caused by the seven strains. Even though there is less disease overall, other strains of Streptococcus pneumoniae that are not in PCV7 have become more common. PCV13 includes 6 additional serotypes, protecting against more disease than PCV7. In particular, PCV13 vaccine protects against serotype 19A, which has become the most common pneumococcal serotype and is often resistant to antibiotics.
i'm a little confused... and dh is complicating things by trying to explain it the hard way lol
Answer by DarkFaery131 at 10:19 PM on Aug. 3, 2010