Conjugated pneumococcal vaccine versus polysaccharide pneumococcal vaccine for prevention of pneumonia and invasive pneumococcal disease in immunocompetent and immunocompromised adults and children

The primary objective is to compare the effects of pneumococcal conjugated vaccines (PCV) alone or added to a pneumococcal polysaccharide vaccine (PPSV) versus PPSV alone for the prevention of any pneumonia.

Secondary objectives are:

  1. to compare the effect of PCV versus PPSV vaccine on any IPD and IPD caused by VT serotypes;
  2. to compare the effect of PCV versus PPSV vaccine on VT pneumonia and any pneumonia requiring hospitalisation;
  3. to examine the effects of PCV versus PPSV on immunological outcomes (antibodies level; opsonophagocytic activity);
  4. to compare the effect of PCV versus PPSV on serotype replacement; and
  5. to compare the adverse events caused by PCV to the adverse events caused by PPSV.

This is a protocol.

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