Dengue Fever

Clinical Research Centre, Hospital Kuala Lumpur

The Clinical Epidemiology of Hospitalized Dengue Cases in Malaysia

Dr. Woon Yuan Liang

Doctor

Clinical Research Centre, Malaysia

Participants (both Cohort 1 and 2) received 3 injections of the CYD Dengue vaccine, 1 injection each at 0, 6, and 12 months.

Participants (Cohort 1) received rabies vaccine at Month 0 and placebo at 6 and 12 months. Participants (Cohort 2) received placebo at 0, 6, and 12 months.

Participants (both Cohort 1 and 2) received 3 injections of the CYD Dengue vaccine, 1 Inj. each at 0, 6 months, and 12 months.

CYD Dengue Vaccine Group

Control Group

Total

Sex: Female, Male

Symptomatic VCD cases were defined as acute febrile illness with fever lasting for at least 1 day (temperature >= 37.5 degree Celsius (°C) measured at least twice with an interval of at least 4 hours), confirmed by reverse transcriptase-polymerase chain reaction and/or dengue non-structural protein-1 (NS1) enzyme-linked immunosorbent assay antigen test, and occurring more than 28 days after the third injection. Vaccine efficacy was reported as density incidence (cases/100 person-years at risk). Density incidence was defined as the number of VCD cases divided by the cumulative person-years at risk.

Participants (both Cohort 1 and 2) received 3 injections of the CYD Dengue vaccine, 1 Inj. each at 0, 6, and 12 months.

Number of Symptomatic Virologically-Confirmed Dengue (VCD) Cases During the Active Phase Post-dose 3 Following Inj. With Either CYD Dengue Vaccine or a Placebo

The severity of VCD cases was assessed by WHO 1999 severity assessment and IDMC clinical assessment. Dengue Hemorrhagic Fever (DHF) Grade I, II, III, and IV : Clinical Manifestations: a) Fever: acute onset, high and continuous, lasting 2-7 days, b) Any of hemorrhagic manifestations: petechiae, purpura, ecchymosis, epistaxis, gum bleeding, and hematemesis and/or melena, c) thrombocytopenia (platelet count=100 000/mm3 or less) d) Plasma leakage as shown by hemoconcentration (hematocrit increased by 20% or more) or pleural effusion and/or hypoalbuminemia. IDMC severity criteria: 1) Thrombocytopenia: platelet count <= 50 000/mm^3; 2) Hemorrhage that needs blood transfusion; 3) Objective evidence of capillary permeability 4) Signs of circulatory failure; 5) Visceral Manifestations. Vaccine efficacy was reported as density incidence (cases/100 person-years at risk). Density incidence was defined as the number of VCD cases divided by the cumulative person-years at risk.

Number of Severe VCD Cases During the Active Phase Post-dose 3 Following Inj. With Either CYD Dengue Vaccine or a Placebo

Symptomatic VCD cases were defined as acute febrile illness with fever lasting for at least 1 day (temperature >= 37.5°C measured at least twice with an interval of at least 4 hours), confirmed by dengue reverse transcriptase-polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay antigen test, and occurring more than 28 days after the third injection. Vaccine efficacy was reported as density incidence (cases/100 person-years at risk). Density incidence was defined as the number of VCD cases divided by the cumulative person-years at risk.

Number of Symptomatic VCD Cases During the Active Phase Following at Least Two Inj. With Either CYD Dengue Vaccine or a Placebo

GMT of antibodies against each serotype with the parental dengue virus strain were assessed by the plaque reduction neutralization test (PRNT).

Geometric Mean Titers (GMTs) of Antibodies Against Each Serotype With the Parental Dengue Virus Strain Before and Following Inj. With Either CYD Dengue Vaccine or a Placebo

GMTs of antibodies against each serotype with the parental dengue virus strain were assessed by the PRNT. Dengue immune participants were defined as those participants with titers >= 10 (1/dilution) against at least one dengue serotype at baseline.

GMTs of Antibodies Against Each Serotype With the Parental Dengue Virus Strain in Dengue-Immune Participants Before and Following Inj. With Either CYD Dengue Vaccine or a Placebo

GMTs of antibodies against each serotype with the parental dengue virus strain were assessed by the PRNT. Dengue non-immune participants were defined as participants with titers < 10 (1/dilution) against all four dengue serotypes at baseline.

GMTs of Antibodies Against Each Serotype With the Parental Dengue Virus Strain in Dengue Non-Immune Participants Before and Following Inj. With Either CYD Dengue Vaccine or a Placebo

Solicited Inj. site reactions: Pain, Erythema, and Swelling. Pain: - Grade 1: easily tolerated, Grade 2: sufficiently discomforting to interfere with normal behavior or activities, Grade 3: incapacitating, unable to perform usual activities. Erythema and Swelling: - Grade 1: > 0.0 to < 2.5 cm, Grade 2: >= 2.5 to < 5 cm, Grade 3: >= 5 cm.

Percentage of Participants With Solicited Inj. Site Reactions Following Any and Each Inj. With Either CYD Dengue Vaccine or a Placebo

Solicited systemic reactions: Fever, Headache, Malaise, Myalgia, and Asthenia. Fever:- Grade 1: >=37.5°C to <=38.0°C, Grade 2: >38.0°C to <=39.0°C, Grade 3: >39.0°C. Headache, malaise, myalgia and asthenia: - Grade 1: noticeable but does not interfere with daily activities, Grade 2: interferes with daily activities, Grade 3: prevents daily activities.

Percentage of Participants With Solicited Systemic Reactions Following Any and Each Inj. With Either CYD Dengue Vaccine or a Placebo

Symptomatic VCD cases were defined as acute febrile illness with fever lasting for at least 1 day (temperature >=37.5°C measured at least twice with an interval of at least 4 hours), confirmed by reverse transcriptase-polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay antigen test, and occurring more than 28 days after the third injection. Vaccine efficacy was reported as density incidence (cases/100 person-years at risk). Density incidence was defined as the number of VCD cases divided by the cumulative person-years at risk.

Number of Symptomatic VCD Cases During the Active Phase Following at Least One Inj. With Either CYD Dengue Vaccine or a Placebo

Symptomatic VCD cases were defined as acute febrile illness with fever lasting for at least 1 day (temperature >= 37.5°C measured at least twice with an interval of at least 4 hours), confirmed by reverse transcriptase-polymerase chain reaction and/or dengue NS1 enzyme-linked immunosorbent assay antigen test, and occurring more than 28 days after the third injection. VCD cases confirmed only by NS1 method were classified in the Not Identified category. Cases were defined as the number of participants with at least one symptomatic VCD episode more than 28 days after Inj. 3 (during the Active Phase).

Number of Participants With One VCD Episode During the Active Phase Due to Each Serotypes Following Inj. With Either CYD Dengue Vaccine or a Placebo

Clinical signs and symptoms for VCD included the following: fever, clinical syndrome and hospitalization. Duration of each symptom (in days) is reported in this outcome measure.

Mean Number of Days for Clinical Signs and Symptoms (Fever, Clinical Syndrome and Hospitalization) of VCD During the Active Phase Following Inj. With Either CYD Dengue Vaccine or a Placebo

Number of Participants Requiring Hospitalization for VCD During the Active Phase Following Inj. With Either CYD Dengue Vaccine or a Placebo

Overall Study

Medical Director

Dengue Virus

Dengue Hemorrhagic Fever

Dengue Diseases

CYD Dengue Vaccine

Inactivated rabies virus vaccine

Placebo

Sanofi Pasteur Investigational Site

Efficacy and Safety of Dengue Vaccine in Healthy Children

Efficacy and Safety of Dengue Vaccine in Healthy Children Aged 4 to 11 Years in Thailand

Individual participant data (IPD) and supporting clinical documents are available for request at www.clinicalstudydatarequest.com. While making information available we continue to protect the privacy of the participants in our clinical trials and to remove commercially confidential information (CCI). Details on Data Sharing criteria and process for requesting access can be found at this web address: Clinicalstudydatarequest.com/Sanofi.

Sanofi Pasteur, a Sanofi Company

The observer-blind design was chosen since the products have different appearances and could be recognized. The person who performed vaccinations knew which product was administered while neither the participant nor the Investigator in charge of safety evaluation knew which product was injected. To maintain the blind and minimize the potential bias, the control group used the same route and schedule as the study vaccine.

hypoproteinemia/koorts

The Clinical Epidemiology of Hospitalized Dengue Cases in Malaysia

Efficacy and Safety of Dengue Vaccine in Healthy Children

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