https://www.sciencedaily.com/releases/2010/09/100907163325.htm
Dosing schedule of pneumococcal vaccine linked with increased risk of getting multiresistant strain...
Infants who received heptavalent pneumococcal conjugate vaccination at 2, 4, and 11 months were more likely than unvaccinated controls to have nasopharyngeal...
dosing schedulepneumococcal vaccine