A Clinical Trial to Assess the Efficacy and Safety of an Inactivated Vaccine (Vero Cell) Against EV71 in Chinese Children Aged 6-35 Months

Hand, Foot and Mouth Disease Clinical Trial

Official title:

A Multiple-center Randomized Double-blind Placebo-controlled Phase 3 Clinical Trial to Assess the Efficacy and Safety of an Inactivated Vaccine (Vero Cell) Against EV71 in Chinese Children Aged 6-35 Months

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01508247
• Other study ID #: JSVCT010
• Status: Completed
• Phase: Phase 3
• First received: January 4, 2012
• Last updated: March 27, 2013
• Start date: January 2012
• Est. completion date: March 2013

Study information

• Verified date: March 2013
• Source: Jiangsu Province Centers for Disease Control and Prevention
• Contact: n/a
• Is FDA regulated: No
• Health authority: China: Food and Drug Administration
• Study type: Interventional

Clinical Trial Summary

Since its discovery in 1969, enterovirus 71 (EV71) has been recognised as a frequent cause of epidemics of hand-foot-mouth disease (HFMD) associated with severe neurological sequelae in a small proportion of cases. There has been a significant increase in EV71 epidemic activity throughout the Asia-Pacific region since 1997. Recent HFMD epidemics in this region have heen associated with a severe from of brainstem encephalitis associated with pulmonary oedema and high case-fatality rates.

The data from the phase 1 and 2 trials suggested that the inactivated EV71 vaccine had a clinically acceptable safety and good immunogenicity for healthy Chinese children and infants. According to the immunogenicity and safety results, the 320U with adjuvant with immunizing schedule of two doses (per 28 day) will be applied in phase 3 clinical trial.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10245
• Est. completion date: March 2013
• Est. primary completion date: March 2013
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 6 Months to 35 Months

Eligibility

Inclusion Criteria:

Only subjects fulfilling all of the following criteria will be eligible for the study:

• Healthy children aged from 6 to 35 months old

• General good health as established by medical history and physical examination

• The subjects' guardians are able to understand and sign the informed consent

• Had never received the vaccine against EV71

• The subjects' guardians allow to comply with the requirements of the protocol

• Available for all visits scheduled in this study

• Subjects with temperature <=37.0°C on axillary setting

Exclusion Criteria:

Subjects will not be eligible for the study if any of the following criteria is met:

• Subject who has a medical history of HFMD

• Subject that has a medical history of any of the following: allergic history, or allergic to any ingredient of vaccine

• Family history of seizures or progressive neurological disease

• Family history of congenital or hereditary immunodeficiency

• Severe malnutrition or hypogenesis

• Major congenital defects or serious chronic illness, including perinatal brain damage

• Autoimmune disease

• Bleeding disorder diagnosed by a doctor or significant bruising or bleeding difficulties with IM injections or blood draws

• Asplenia, functional asplenia, or splenic excision

• History of asthma, angioneurotic edema, diabetes or malignant tumour

• History of thyroidectomy, or thyroid disease in last 12 months

• Any acute infections in last 7 days

• Any prior administration of immunodepressant or corticosteroids in last 6 months

• Any prior administration of blood products in last 3 months

• Any prior administration of other research vaccines or medicines in last 1 month

• Any prior administration of attenuated live vaccine in last 15 days

• Any prior administration of subunit or inactivated vaccines in last 7 days

• Under the anti-TB prevention or therapy

• Subjects with temperature >37.0°C on axillary setting

• Any condition that in the opinion of the investigator, may interfere with the evaluation of study objectives

Exclusion Criteria for the second dose:

Subjects will not be eligible for the second dose if any of following adverse events happened after the first dose. They can continue other process of the study without the second dose vaccination according to the opinion of the investigator.

• Had any serious adverse events related to the first dose of inactivated vaccine (vero cell) against EV71 within 7 days

• Hypersensitivity reactions after vaccination (including urticaria/rashes that occur within 30 minutes after inoculation)

• Anaphylaxis after vaccination

• Any confirmed or suspected autoimmune disease or immune deficiency diseases, including human immunodeficiency virus (HIV) infection

• Any condition that in the opinion of the investigator, or IRB

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Prevention

Related Conditions & MeSH terms

• Hand, Foot and Mouth Disease
• Herpangina
• Mouth Diseases
• Other EV71-associated Diseases

Intervention

Biological:
• inactivated vaccine (Vero Cell) against EV71
inactivated vaccine (vero cell) against EV71, 320U /0.5ml, two doses, on day0, 28
• 0/0.5ml placebo
0/0.5ml placebo, two doses, on day0, 28

Locations

Country	Name	City	State
China	Chaoyang Distinct Center for Disease Control and Prevention	Beijing
China	Donghai County Center for Disease Control and Prevention	Lianyungang	Jiangsu
China	Pizhou County-Level City Center for Disease Control and Prevention	Xuzhou	Jiangsu
China	Baoying County Center for Disease Control and Prevention	Yangzhou	Jiangsu

Sponsors (2)

Lead Sponsor	Collaborator
Jiangsu Province Centers for Disease Control and Prevention	Bejing Vigoo Biological Co., LTD

Country where clinical trial is conducted

China, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	the incidence density of the EV71-associated diseases in the vaccine group and placebo group.	compare the incidence density of the EV71-associated diseases between the vaccine group and placebo group in Chinese children aged 6-35 months.	begin at day 56 up to 14 months	No
Secondary	the frequency of all the adverse events in vaccine group and placebo group.	compare frequency of all the solicited events, unsolicited adverse events and serious adverse events between vaccine group and placebo group.	up to 14 months	Yes
Secondary	Seropositive rate of the vaccine group	calculate the seropositive rate of the vaccine group in Chinese children aged 6-35 months at month 8 after first vaccination.	8 months after first vaccination	No
Secondary	Seroconversion rate of the vaccine group	calculate the seroconversion rate of the vaccine group in Chinese children aged 6-35 months at month 8 after first vaccination.	8 months after first vaccination	No
Secondary	GMT of the vaccine group	calculate the geometric mean titre (GMT) of the vaccine group in Chinese children aged 6-35 months at month 8 after first vaccination.	8 months after first vaccination	No
Secondary	Seropositive rate of the vaccine group	calculate the seropositive rate of the vaccine group in Chinese children aged 6-35 months at month 14 after first vaccination.	14 months after first vaccination	No
Secondary	Seroconversion rate of the vaccine group	calculate the seroconversion rate of the vaccine group in Chinese children aged 6-35 months at month 14 after first vaccination.	14 months after first vaccination	No
Secondary	GMT of the vaccine group	calculate the geometric mean titre (GMT) of the vaccine group in Chinese children aged 6-35 months at month 14 after first vaccination.	14 months after first vaccination	No
Secondary	Seropositive rate of the vaccine group and placebo group	compare the seropositive rate of the vaccine group and placebo group in healthy children aged 6-35 months.	28 days after the second vaccination	No
Secondary	Seroconversion rate of the vaccine group and placebo group	compare the Seroconversion rate of the vaccine group and placebo group in healthy children aged 6-35 months.	28 days after the second vaccination	No
Secondary	GMT of the vaccine group and placebo group	compare the geometric mean titre (GMT) of the vaccine group and placebo group in healthy children aged 6-35 months.	28 days after the second vaccination	No
Secondary	GMI of the vaccine group and placebo group	compare the geometric mean fold increase (GMFI) of the vaccine group and placebo group in healthy children aged 6-35 months.	28 days after the second vaccination	No