Pneumococcal Conjugate can include anaphylactic shock, which can cause the throat to swell, cutting off the airway. The lack of oxygen can cause brain damage, disability, or death. The pneumococcal conjugate vaccine provides immunity from diseases caused by the Streptococcus pneumoniae bacteria, which include more than 90 different types of bacteria, which can cause life-threatening diseases including blood infections, pneumonia, and meningitis, often in young children.