Each 0.5 ml dose contains 25 mcg polysaccharide of each pneumococcal type. How should I keep pneumococcal vaccine-injection stored? Pneumococcal vaccine should be refrigerated between 2 C to 8 C (36 F to 46 F).Summary Pneumococcal polyvalent vaccine (Pneumovax 23, Pnu-Imune 23) is a vaccine...