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Inclusion Criteria:

* Had been identified as a potential participant by the Sponsor and is included in the list provided to the Investigator (i.e., aged 9 to 16 years on the day of first vaccination of CYD dengue vaccine in CYD13/CYD30 and has a post-dose 3 serum sample available \[at least 400 microliters of serum\]).
* Participants were in good health, based on medical history and physical examination.
* Assent form or informed consent form (ICF) had been signed and dated by the participant (based on local regulations), and ICF had been signed and dated by the parent(s) or another legally acceptable representative (and by an independent witness if required by local regulations).
* Participant and parent(s)/legally acceptable representative(s) attended all scheduled visits and complied with all trial procedures.

Exclusion Criteria:

* Participant who received any other dengue vaccination that was not part of the CYD13 or CYD30 trials.
* Participant was pregnant, or lactating, or of childbearing potential (to be considered of non childbearing potential, a female must be pre-menarche or post-menopausal for at least 1 year, surgically sterile, or using an effective method of contraception or abstinence from at least 4 weeks prior to vaccination until at least 4 weeks after vaccination).
* Participation at the time of study enrollment (or in the 4 weeks preceding the trial vaccination) or planned participation during the present trial period in another clinical trial investigating a vaccine, drug, medical device, or medical procedure.
* Receipt of any vaccine in the 4 weeks preceding the trial vaccination or planned receipt of any vaccine in the 4 weeks following the trial vaccination.
* Receipt of immune globulins, blood or blood-derived products in the past 3 months.
* Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months).
* Known systemic hypersensitivity to any of the vaccine components, or history of a life-threatening reaction to the vaccines used in the trial or to a vaccine containing any of the same substances.
* Chronic illness that, in the opinion of the Investigator, was at a stage where it might interfere with trial conduct or completion.
* Receipt of blood or blood-derived products in the past 3 months, which might interfere with assessment of the immune response.
* Deprived of freedom by an administrative or court order, or in an emergency setting, or hospitalized involuntarily.
* Current alcohol abuse or drug addiction.
* Moderate or severe acute illness/infection (according to investigator judgment) on the day of vaccination or febrile illness (temperature \>= 38.0°C). A prospective participant should not be included in the study until the condition had resolved or the febrile event had subsided.
* Identified as an Investigator or employee of the Investigator or study center with direct involvement in the proposed study, or identified as an immediate family member (i.e., parent, spouse, natural or adopted child) of the Investigator or employee with direct involvement in the proposed study.

• Vitória, Brazil
• Bucaramanga, Colombia
• Tegucigalpa, Honduras
• Temixco, Mexico
• Carolina, Puerto Rico