Direct effectiveness of pneumococcal polysaccharide vaccine against invasive pneumococcal disease and non-bacteremic pneumococcal pneumonia in elderly population in the era of pneumococcal conjugate vaccine: A case-control study.
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DOI: 10.1016/j.vaccine.2019.04.017
Abstract: BACKGROUND While herd effects and serotype replacement by childhood pneumococcal protein conjugated vaccines (PCVs) continues to accumulate worldwide, direct effectiveness of 23-valent pneumococcal polysaccharide vaccine (PPV23) against pneumococcal diseases in the elderly has been challenged.… read more here.
Keywords: polysaccharide vaccine; direct effectiveness; pneumococcal polysaccharide; ipd ... See more keywords