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low dose Bivalent Enterovirus Vaccine, Inactivated

Phase 3

Hand, Foot, and Mouth Disease(HFMD) | Vaccine | Infectious Disease |Sinovac Biotech, Ltd|Last Updated: Jun 26, 2026

Target and mechanism

ModalityVaccine

Also known as bivalent enterovirus vaccine (Vero cell), inactivated, bivalent enterovirus vaccine, inactivated

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment8,000

FDA Designations

No designations recorded

Clinical trial landscape

low dose Bivalent Enterovirus Vaccine, Inactivated · 2 trials · 3 indications

Phase 3 1Phase 1 1
NCT06734832Efficacy, Safety, and Immunogenicity of the Bivalent Inactivated Enterovirus Vaccine (Vero Cell)Hand, Foot, and Mouth Disease(HFMD)
RECRUITING8,000 Analytics
PHASE3RECRUITING
Efficacy, Safety, and Immunogenicity of the Bivalent Inactivated Enterovirus Vaccine (Vero Cell)
Hand, Foot, and Mouth Disease(HFMD)Unlock trial analytics

Study Endpoints

Primary Endpoints

Evaluate the primary vaccine efficacy of the trial vaccine against HFMD caused by CA16 infection compared to the control vaccine.
1 year

Evaluate the primary vaccine efficacy of the trial vaccine against HFMD caused by CA16 infection, diagnosed by RT-PCR, in children aged 6 to 71 months (with and without a history of EV71 vaccination) 14 days after full vaccination (based on data from at least 47 cases). The vaccine's efficacy will be evaluated by monitoring the annual incidence rate of HFMD attributable to CA16 infection, as confirmed by reverse transcription polymerase chain reaction (RT-PCR) nucleic acid testing, following complete full immunization for 14 days based on data from at least 47 cases until the end of one epidemic seasons.

Evaluate whether the neutralizing antibody levels against EV71 in the trial group are non-inferior to those in the control group after two doses of vaccination.
60 days

Evaluate the seroconversion rate and geometric mean titer (GMT) of EV71 neutralizing antibodies in participants aged 6-71 months without a history of EV71 vaccination and negative for EV71 antibodies before immunization, 30 days after full vaccination.

Phase Ⅰ: Based on adverse events, evaluate the safety of the trial vaccine among participants in different age groups
30 days

the incidence rates of adverse reactions from the start of vaccination to 30 days after the end of the entire vaccination course

Phase Ⅱ: Evaluate the immunogenicity of the trial vaccine in the target population.
30 days

The seroconversion rate of EV71 and CA16 neutralizing antibodies in children aged 6-71 months 30 days after the end of the entire vaccination course.

Secondary Endpoints

Evaluate the safety of the trial vaccine.
6 monthes
Evaluate the long-term vaccine efficacy of the trial vaccine compared to the control vaccine against HFMD caused by CA16 infection
2 years
Evaluate the long-term vaccine efficacy of the trial vaccine compared to the control vaccine against Herpangina(HA) caused by CA16 infection
2 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
trial groupEXPERIMENTALBivalent enterovirus inactivated vaccine (Vero cell)
control groupACTIVE_COMPARATOREnterovirus Type 71 Vaccine (Vero Cell), Inactivated
low-dose experimental groupEXPERIMENTALphase Ⅰ: 18\~59 years old,6\~12 years old,6\~71 months old; phase Ⅱ:6\~71 months old
medium-dose experimental groupEXPERIMENTALphase Ⅰ: 18\~59 years old,6\~12 years old,6\~71 months old; phase Ⅱ:6\~71 months old
high-dose experimental groupEXPERIMENTALphase Ⅰ: 18\~59 years old,6\~12 years old,6\~71 months old; phase Ⅱ:6\~71 months old
Active control groupACTIVE_COMPARATORphase Ⅰ: 6\~71 months old; phase Ⅱ:6\~71 months old

Interventions

NameTypeDescription
bivalent enterovirus vaccine (Vero cell), inactivatedBIOLOGICALTwo doses are administered with a one-month interval between each dose.
Enterovirus Type 71 Vaccine (Vero Cell), InactivatedBIOLOGICALTwo doses are administered with a one-month interval between each dose.
low dose Bivalent Enterovirus Vaccine (Vero Cell), InactivatedBIOLOGICALBivalent Enterovirus Vaccine (Vero Cell), Inactivated antigen content: EV71 480 U-CA16 600 SU/0.5 ml
medium dose Bivalent Enterovirus Vaccine (Vero Cell), InactivatedBIOLOGICALBivalent Enterovirus Vaccine (Vero Cell), Inactivated antigen content: EV71 960 U-CA16 600 SU/0.5 ml
high dose Bivalent Enterovirus Vaccine (Vero Cell), InactivatedBIOLOGICALBivalent Enterovirus Vaccine (Vero Cell), Inactivated antigen content: EV71 1920U-CA16 1200SU/0.5ml
Enterovirus type EV71 vaccine (Vero cell), InactivatedBIOLOGICALEnterovirus type EV71 vaccine (Vero cell), Inactivated (Sinovac)
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Eligibility Criteria

Age Range6 Months to 71 Months
SexALL
Healthy VolunteersYes
Study Sites4

Inclusion Criteria: * Healthy children aged 6 to 71 months with no history of EV71 vaccination; or healthy children aged 24 to 71 months who have completed two doses of EV71 vaccine at least 6 months prior. * Guardians who can understand and voluntarily sign the informed consent form. * Willing and...

Countries:China
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Recent Changes (Last 90 Days)

MEDIUMJul 27, 2026NCT06063057TRIAL_REMOVED: changed
MEDIUMJul 27, 2026NCT06063057TRIAL_REMOVED: changed
MEDIUMJul 27, 2026NCT06063057TRIAL_REMOVED: changed
MEDIUMJul 27, 2026NCT06063057TRIAL_REMOVED: changed
HIGHJun 26, 2026NCT06063057Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 26, 2026NCT06063057Status: ACTIVE_NOT_RECRUITING → COMPLETED

Frequently asked questions about low dose Bivalent Enterovirus Vaccine, Inactivated

What is the low dose Bivalent Enterovirus Vaccine, Inactivated?

The low dose Bivalent Enterovirus Vaccine, Inactivated is an investigational vaccine developed by Sinovac Biotech, Ltd for the prevention of Hand, Foot and Mouth Disease (HFMD). It is a bivalent, inactivated vaccine produced using Vero cell technology, designed to protect against enterovirus infections that cause HFMD.

What is the low dose Bivalent Enterovirus Vaccine, Inactivated used for?

It is being developed for the prevention of Hand, Foot and Mouth Disease (HFMD), a common infectious disease in young children. Clinical trials have also enrolled participants with herpangina as a related condition. The vaccine is intended for healthy volunteers, with trial enrollment starting at 6 months of age.

Who makes the low dose Bivalent Enterovirus Vaccine, Inactivated?

Sinovac Biotech, Ltd is developing the low dose Bivalent Enterovirus Vaccine, Inactivated. Sinovac Biotech trades under the ticker SVA. The company is the sponsor of the clinical trials evaluating this vaccine candidate.

What phase is the low dose Bivalent Enterovirus Vaccine, Inactivated in?

The low dose Bivalent Enterovirus Vaccine, Inactivated is in clinical development. A Phase 1/2 trial (NCT06063057) has been completed, and a Phase 3 trial (NCT06734832) is currently recruiting. The vaccine is investigational and has not been approved for commercial use.

What clinical trials is the low dose Bivalent Enterovirus Vaccine, Inactivated in?

Two trials have evaluated this vaccine. NCT06063057 was a completed Phase 1/2 trial with 744 participants in China. NCT06734832 is a recruiting Phase 3 trial with an planned enrollment of 8,000 participants in China. Both trials enrolled healthy volunteers starting at 6 months of age.

Is the low dose Bivalent Enterovirus Vaccine, Inactivated the same as bivalent enterovirus vaccine (Vero cell), inactivated?

Yes. The low dose Bivalent Enterovirus Vaccine, Inactivated is also known as bivalent enterovirus vaccine (Vero cell), inactivated, and bivalent enterovirus vaccine, inactivated. These names refer to the same Sinovac Biotech vaccine candidate for Hand, Foot and Mouth Disease.