A Study to Evaluate the Safety, Tolerability, and Immunogenicity of V114 in Children With Sickle Cell Disease (V114-023/PNEU-SICKLE)

Inclusion Criteria:

- Documented diagnosis of sickle cell disease in their medical record

- Female participants: not pregnant or breastfeeding, and at least 1 of the following
conditions apply:

1) not a woman of childbearing potential (WOCBP) as defined in the protocol, or 2) a
WOCBP who agrees to follow the contraceptive guidance in the protocol during the
treatment period and for at least 6 weeks after the last dose of study vaccine

- Has a legally acceptable representative who understands the study procedures,
alternate treatments available, and risks involved with the study and voluntarily
agrees to participate by giving written informed consent/assent.

Exclusion Criteria:

- History of Invasive Pneumococcal Disease (positive blood culture, positive
cerebrospinal fluid culture, or positive culture at another sterile site) or known
history of other culture-positive pneumococcal disease within 3 years of Visit 1 (Day
1)

- Known hypersensitivity to any component of pneumococcal conjugate vaccine (PCV), or
any diphtheria toxoid-containing vaccine

- Known or suspected impairment of immunological function

- History of congenital or acquired immunodeficiency

- Documented human immunodeficiency virus (HIV) infection

- History of autoimmune disease (including but not limited to systemic lupus
erythematosus, antiphospholipid syndrome, Behcet's disease, autoimmune thyroid
disease, polymyositis and dermatomyositis, scleroderma, or type 1 diabetes mellitus)

- Known coagulation disorder contraindicating intramuscular vaccination

- History of malignancy ≤5 years prior to signing informed consent/assent, except for
adequately treated basal cell or squamous cell skin cancer or in situ cervical cancer

- A WOCBP who has a positive urine or serum pregnancy test before the first vaccination
at Visit 1 (Day 1)

- Received any PCV or pneumococcal polysaccharide vaccine <3 years before Visit 1 (Day
1)

- Five (5) years of age and has received <3 doses of PCV

- Receiving immunosuppressive therapy, including chemotherapeutic agents used to treat
cancer or other conditions, and interventions associated with organ or bone marrow
transplantation, or autoimmune disease. Note: hydroxyurea is permitted

- Received immunoglobulin within 6 months before receipt of study vaccine

- Participated in another clinical study of an investigational product within 2 months
before the beginning or anytime during the duration of the current clinical study.
Participants enrolled in observational studies may be included

- Recent history (within the last year) of more than 3 inpatient hospitalizations

- At the time of signing informed consent/assent, is a user of recreational or illicit
drugs or has had a recent history (within the last year) of drug or alcohol abuse or
dependence as assessed by the study investigator

- History or current evidence of any condition, therapy, lab abnormality or other
circumstance that might expose the participant to risk by participating in the study,
confound the results of the study, or interfere with the participant's participation
for the full duration of the study in the opinion of the Investigator

- Is or has an immediate family member (eg, spouse, parent/legal guardian, sibling, or
child) who is investigational site or Sponsor staff directly involved with this study.