Pneumococcal bacteria can cause pneumonia, meningitis, septicemia, otitis media and other diseases. There was high incidence of infants under 2 years of age and older people.

肺炎球菌可引起肺炎、脑膜炎、败血症、中耳炎等疾病，在2岁以下婴幼儿和老年人中发病率最高。

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In fact, one paper Mercola cites, which noted a 71% increase in the prevalence of 19A, also said there had been a dramatic 44% reduction in invasive pneumococcal disease, including pneumonia, meningitis, and bloodstream infections and that includes the increase in 19A. The new vaccine, Prevnar 13, introduced in 2010, protects against the deadly 19A strain, which now appears to be on the wane.

FORBES: A Vaccine Eliminated A Deadly Killer Of Infants. So Why Do Some People Fear It?

The pneumococcal vaccine, made by Pfizer, has resulted in dramatic drops in meningitis and pneumonia.

FORBES: How Vaccines Have Changed Our World In One Graphic