Recent Updates
Recently added Catalysts

cH15/3

Phase 1

Influenza | Monoclonal antibody | Infectious Disease |National Healthcare Corp.|Last Updated: Jul 31, 2026

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment60

FDA Designations

No designations recorded

Clinical trial landscape

cH15/3 · 1 trial · 1 indication

Phase 1 1
NCT07703514Safety and Immunogenicity of Chimeric Hemagglutinin mRNA Vaccine CandidatesInfluenza
NOT YET_RECRUITING60 Analytics
PHASE1NOT YET_RECRUITING
Safety and Immunogenicity of Chimeric Hemagglutinin mRNA Vaccine Candidates
InfluenzaUnlock trial analytics

Study Endpoints

Primary Endpoints

Geometric mean fold rise (GMFR) from baseline in HA-stalk specific titers by ELISA
Day 1 through Day 85
Geometric mean titer (GMT) by ELISA
Day 1 Through Day 85
Number and percentage of participants with greater than or equal to a 2-, 4-, and 10-fold rise from baseline in Hemagglutinin (HA)-stalk specific titers by ELISA
Day1 through Day 85
Occurrence of Adverse Events of Special Interest (AESIs)
Day 1 through Day 240
Occurrence of Guillain-Barre Syndrome (GBS)
Through Day 240
Occurrence of hematological or biochemical laboratory adverse events
Day 8 through Day 64
Occurrence of laboratory confirmed influenza A infection
Through Day 240
Occurrence of Medically-Attended Adverse Events (MAAEs)
Through Day 240
Occurrence of New-Onset Chronic Medical Conditions (NOCMCs)
Through Day 240
Occurrence of Serious Adverse Events (SAEs)
Through Day 240
Occurrence of solicited local adverse events (AEs)
Day 1 through Day 64
Occurrence of solicited systemic adverse events (AEs)
Day 1 through Day 64
Occurrence of unsolicited adverse events (AEs)
Day 1 through Day 85

Secondary Endpoints

Geometric mean fold-rise (GMFR) from baseline in Hemagglutinin (HA) stalk specific titers by ELISA
Day 240
Hemagglutinin (HA)-stalk specific geometric mean titer (GMT) by ELISA
Day 240
Number and percentage of participants with greater than or equal to a 2-, 4-, and 10-fold rise from baseline in Hemagglutinin (HA) -stalk specific titers by ELISA
Day 240
Unlock Study Endpoints

Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Cohort 1, Arm1EXPERIMENTALHealthy adults will receive 2 monovalent dose intramuscular injections. cH8/1 (25ug) chimeric Hemagglutinin (HA) is the first dose given on Day 1, followed by a second dose administered 57 days later with cH5 /1(25 ug). N = 10
Cohort 1, Arm2EXPERIMENTALHealthy adults will receive 2 monovalent dose intramuscular injections. cH15/3 (25ug) chimeric HA is the first dose given on Day 1, followed by a second dose of cH4/3 (25ug), administered 57 days later. N = 10.
Cohort 1, Arm3EXPERIMENTALHealthy adults will receive 2 low dose bivalent intramuscular injections. cH8/1(12.5ug) + cH15/3 (12.5ug) chimeric HA is the first dose given on Day 1, followed by a second dose of cH5/1 (12.5ug) + cH4/3(12.5 ug) administered 57 days later. N = 10.
Cohort 2, Arm4EXPERIMENTALHealthy adults will receive a single high dose bivalent combination intramuscular injection along with a placebo dose. cH8/1(25ug) + cH15/3(25ug) will be administered on Day 1, followed by a placebo dose 57 days later. N = 10.
Cohort 2, Arm5EXPERIMENTALHealthy adults will receive a single high dose bivalent combination intramuscular injection along with a placebo dose. cH5/1(25ug) + cH4/3(25ug) will be administered on Day 1, followed by a placebo dose 57 days later. N = 10.
Cohort 2, Arm6EXPERIMENTALHealthy adults will receive 2 high dose bivalent intramuscular injections. cH8/1(25ug) + cH15/3 (25ug) is the first dose given on Day 1, followed by the second dose of cH5/1(25 ug) + cH4/3 (25 ug) administered 57 days later. N = 10.

Interventions

NameTypeDescription
cH15/3BIOLOGICALThe cH15/3 RNA study product encodes for a novel chimeric hemagglutinin comprised of an H15 HA head domain derived from influenza A/wedge-tailed shearwater/Western Australia/2576/1979 (H15N9) and the conserved stem domain derived from influenza A/Hong Kong/2014 (H3N2) (GenBank: OQ349633). The cH15/3 RNA is encapsulated in LNPs for delivery. The LNP is comprised of 4 lipid components: ionizable lipid (ALC-0315), distearoylphosphatidylcholine (DSPC), cholesterol (non-animal derived), and PEG lipid (ALC-0159).
cH4/3BIOLOGICALThe cH4/3 RNA encodes a novel chimeric hemagglutinin comprised of an H4 head domain from A/duck/Czechoslovakia/1956 (H4N6) and a conserved stem domain from A/Hong Kong/2014 (H3N2) (GenBank: OQ349617), delivered via lipid nanoparticles (LNPs) containing ionizable lipid (ALC-0315), distearoylphosphatidylcholine (DSPC), cholesterol (non-animal derived), and PEG lipid (ALC-0159).
cH5/1N1BIOLOGICALcH5/1N1 is a H1N1 influenza vaccine: egg grown split inactivated influenza virus vaccines containing chimeric hemagglutinins (HAs). The chimeric viruses contain the globular heads of exotic viruses- and the HA stem domain and neuraminidase protein from currently circulating seasonal H1N1.
cH8/1N1BIOLOGICALcH8/1N1 is a H1N1 influenza vaccine: egg grown split inactivated influenza virus vaccines containing chimeric hemagglutinins (HAs). The chimeric viruses contain the globular heads of exotic viruses- and the HA stem domain and neuraminidase protein from currently circulating seasonal H1N1.
SalineDRUGSodium chloride solution.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 59 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Provision of signed and dated informed consent form before the initiation of any study procedures. 2. Stated willingness to comply with all study procedures and availability for the duration of the study. 3. Non-pregnant healthy adults, aged 18 to 59 years of age, inclusive, ...

Countries:United States
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWJul 31, 2026NCT07703514lastUpdatePostDate: changed
LOWJul 31, 2026NCT07703514lastUpdatePostDate: changed

Frequently asked questions about cH15/3

What is cH15/3 used for?

cH15/3 is an investigational monoclonal antibody being developed for influenza. It is currently in Phase 1 clinical development, with a trial studying its safety and immunogenicity as part of a chimeric hemagglutinin mRNA vaccine candidate. The drug is not yet approved and remains under investigation.

Who makes cH15/3?

cH15/3 is being developed by National Healthcare Corp. (NHC). The company is conducting a Phase 1 clinical trial for this investigational monoclonal antibody, which is being studied for its potential use in influenza.

What phase is cH15/3 in?

cH15/3 is in Phase 1 clinical development. It is an investigational monoclonal antibody being studied for influenza, and it is not yet approved by regulatory authorities. The Phase 1 trial is designed to evaluate safety and immunogenicity.

What clinical trials is cH15/3 in?

cH15/3 is being studied in a Phase 1 clinical trial with the identifier NCT07703514, titled 'Safety and Immunogenicity of Chimeric Hemagglutinin mRNA Vaccine Candidates.' The trial is not yet recruiting and aims to enroll 60 participants in the United States.

Is cH15/3 the same as a chimeric hemagglutinin mRNA vaccine?

cH15/3 is a monoclonal antibody, but it is being studied in a trial that evaluates chimeric hemagglutinin mRNA vaccine candidates. The trial, NCT07703514, is investigating the safety and immunogenicity of these vaccine candidates, which may include cH15/3 as a component.