Pneumococcal Vaccines

The goal of the OPTIMAL clinical trial is to learn if a dose of a pneumococcal conjugate vaccine (PCV) generates a good immune response in young children who are in hospital with severe acute malnutrition. Researchers will compare an intervention group who get a dose of a PCV (Pneumosil) to a control group who get a dose of a Typhoid conjugate vaccine (Typbar TCV). To ensure all participants receive timely potential benefits, at 3 months participants in the intervention group with receive a dose of Typbar TCV, and those in the conrol group will receive a dose of Pneumosil. Participants will be visited 4 times at their homes over six months after vaccination, with a phone review at 12 months after vaccination.

The investigators will evaluate the immune response of immunocompromised adults, who have previously received at least 1 dose of 23-valent pneumococcal polysaccharide vaccine, to the booster with of 21-valent pneumococcal conjugate vaccine . Immune response will be assessed by opsonophagocytic assay reactivity.

The goal of this clinical trial is to evaluate the immunogenicity and safety of Minhai's 13-valent Pneumococcal Polysaccharide Conjugate Vaccine (PCV13-DT/TT) as compared to Pfizer's 13-valent Pneumococcal Conjugate Vaccine (PCV13) when co-administered with Hexavalent Vaccines at 2,4, and 12-15 months of age, to healthy infants in Indonesia. This study aims to demonstrate the non-inferiority of the serotype-specific immune responses elicited by the novel PCV13-DT/TT (Pneuminvac) as compared to PCV13(Prevenar 13) one month after the booster dose, and evaluate the safety of PCV13 co-administrated with Hexavalent Vaccine(Hexaxim).