Streptococcus pneumoniae serotype 3 clinical trials

Carriage to Assess Protection of New Pneumococcal Vaccines - PCV15

This study tests a new vaccine, PCV15, for pneumococcal disease. Researchers will see if it stops people carrying the bacteria in their nose, which can prevent serious illness. Volunteers will get the real vaccine or a dummy, then have a small amount of bacteria put in their nose.