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RIV

Phase 1

COVID-19 Immunization | Monoclonal antibody | Infectious Disease |Sanofi|Last Updated: May 5, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment980

FDA Designations

No designations recorded

Clinical trial landscape

RIV · 1 trial · 2 indications

Phase 1 1
NCT06695130Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and Recombinant Influenza Vaccine in Adult Participants 50 Years of Age and OlderCOVID-19 Immunization
COMPLETED980 Analytics
PHASE1COMPLETED
Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and Recombinant Influenza Vaccine in Adult Participants 50 Years of Age and Older
COVID-19 ImmunizationUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with immediate adverse events (AEs)
Immediate adverse events are any unsolicited systemic adverse events reported in the 30 minutes after vaccination

Within the 30 minutes after vaccination

Number of participants with solicited injection site reactions
Up to 7 each days after vaccination

Solicited injection site reactions include injection site pain, erythema and swelling

Number of participants with solicited systemic reactions
Up to 7 days after each vaccination

Solicited systemic reactions include fever, headache, fatigue, myalgia and chills

Number of participants with unsolicited AEs
Up to 28 days after each vaccination

Unsolicited (spontaneously reported) AEs, not fulfilling criteria for solicited adverse reactions

Number of participants with adverse events of special interest (AESIs)
Up to 180 days after each vaccination

AESIs

Number of participants with medical attended adverse events (MAAEs)
Up to 180 days after each vaccination

MAAEs

Number of participants with MAAEs relating to predefined PIMDs
From Day 182 through 12 months following the last study vaccination

MAAEs relating to predefined PIMDs

Number of participants with serious adverse events (SAEs)
Up to 180 days after each vaccination

SAEs

Number of participants with related SAEs
From Day 182 through 12 months following the last study intervention

Related SAEs

Number of participants with MAAEs relating to predefined PIMDs that meet the criteria for SAEs
From Day 182 through 12 months following the last study vaccination

MAAEs relating to predefined PIMDs that meet the criteria for SAEs

Geometric mean (GM) of HAI titers in all participants
At Day 01 and Day 30

HAI titers

Geometric mean ratio (GMR) of HAI titers in all participants
At Day 01 and Day 30

Individual HAI titers ratio Day 30/Day 01

GM of SARS-CoV-2 neutralizing titers in all participants
At Day 01 and Day 30

SARS-CoV-2 neutralizing titers

GMR of SARS-CoV-2 neutralizing titers ratio D30/D01 in all participants
At Day 01 and Day 30

Individual SARS-CoV-2 neutralizingtiters ratio Day 30/Day 01

Secondary Endpoints

Percentage of participants with seroconversion in all participants
At Day 30
Percentage of participants with HAI titer ≥ 10 (1/dil) in all participants
At Day 01 and Day 30
Percentage of participants with HAI titer ≥ 40 (1/dil) in all participants
At Day 01 and Day 30
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group 1: RIV (in right or left deltoid) and placebo (in opposite deltoid)EXPERIMENTALtwo IM injections on D01
Group 2: rC19 (dose 1) (in right or left deltoid) and placebo (in opposite deltoid)EXPERIMENTALtwo IM injections on D01
Group 3: RIV (in right or left deltoid) and rC19 (dose 1) (in opposite deltoid)EXPERIMENTALtwo IM injections on D01
Group 4: RIV + rC19 (dose 1) (in right or left deltoid) and placebo (in opposite deltoid)EXPERIMENTALtwo IM injections on D01
Group 5: RIV + rC19 (dose 2) (in right or left deltoid) and placeboEXPERIMENTALtwo IM injections on D01
Group 6: RIV + rC19 (dose 3) (in right or left deltoid) and placeboEXPERIMENTALtwo IM injections on D01
Group 7: RIV + rC19 (dose 4) (in right or left deltoid) and placebo (in opposite deltoid)EXPERIMENTALtwo IM injections on D01

Interventions

NameTypeDescription
RIV (recombinant influenza vaccine)BIOLOGICALInfluenza, inactivated, split virus or surface antigen
rC19 (dose 1)BIOLOGICALProtein subunit
RIV + rC19 (dose 1)BIOLOGICALRIV component: Influenza, inactivated, split virus or surface antigen NVXC19 component: Protein subunit
RIV + rC19 (dose 2)BIOLOGICALRIV component: Influenza, inactivated, split virus or surface antigen NVXC19 component: Protein subunit
RIV + rC19 (dose 3)BIOLOGICALRIV component: Influenza, inactivated, split virus or surface antigen NVXC19 component: Protein subunit
RIV + rC19 (dose 4)BIOLOGICALRIV component: Influenza, inactivated, split virus or surface antigen NVXC19 component: Protein subunit
Placebo (0.9% NaCl)OTHERNormal saline
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Eligibility Criteria

Age Range50 Years to N/A
SexALL
Healthy VolunteersYes
Study Sites12

Inclusion Criteria: Inclusion criteria to be checked at Screening Visit: * Aged 50 years or older on the day of inclusion Informed consent * Informed consent form has been signed and dated. * Able to attend all scheduled visits and to comply with all study procedures. * Participant must be able to...

Countries:United States
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Frequently asked questions about RIV

What is RIV used for?

RIV is an investigational monoclonal antibody being developed for COVID-19 immunization. It is intended for use in adults 50 years of age and older. The drug is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes RIV?

RIV is being developed by Sanofi, a multinational pharmaceutical company traded on the stock exchange under the ticker symbol SNY. Sanofi is conducting clinical research to evaluate the safety and efficacy of RIV for COVID-19 immunization.

What phase is RIV in?

RIV is currently in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved for use outside of clinical trials. The Phase 1 trial for RIV has been completed, and the drug remains under evaluation.

What clinical trials is RIV in?

RIV has been studied in one clinical trial with the identifier NCT06695130. This was a Phase 1, randomized, double-blind, controlled study that evaluated a combination vaccine in adult participants aged 50 years and older. The trial enrolled 980 participants and was conducted in the United States.

Is RIV the same as a COVID-19 vaccine?

RIV is a monoclonal antibody being developed for COVID-19 immunization, not a traditional vaccine. It is designed to provide immunity against COVID-19, but it works differently from vaccines. RIV is currently in Phase 1 clinical trials and is not yet approved.