There are 2 types. PCV7 and PPSV23. Both have dead forms of pneumococcal bacteria. They help in the stimulation of antigens that defend against 23 serotypes of pneumococcal bacteria
There are 2 types. PCV7 and PPSV23. Both have dead forms of pneumococcal bacteria. They help in the stimulation of antigens that defend against 23 serotypes of pneumococcal bacteria