Published in Vaccine Weekly, January 12th, 2011
"The incidence of serotypes 1 and 19A showed increasing trends (R-2 >= 0.759; P< 0.001), with no trends for serotype 3. Serotypes 19A, 1, and 3 represented 85% of pediatric isolates in 2008. In serotype 19A, the penicillin...
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