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Only one of the vaccines, PCV13, is considered safe for children under the age of 2, This vaccine is important because infants and very young children are at higher risk for several dangerous infections, including pneumonia and bacterial meningitis.
According to the ACIP recommendations published in September 2014, both pneumococcal conjugate vaccine (PCV13, Prevnar 13, Pfizer) and pneumococcal polysaccharide vaccine (PPSV23, Pneumovax, Merck) should be administered routinely in a series to all adults age 65 years and older.