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New antibody shot shows promise in preventing malaria in african women

NCT ID NCT07060508

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether a single dose of an antibody called L9LS can safely prevent malaria in women of childbearing age in Mali. 279 healthy women and men received either the antibody or a placebo and were monitored for 24 weeks. The goal was to see if the antibody could block blood-stage infection by the malaria parasite.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

279 people

The number who actually took part.

Started

Jul 2025

Finished

Apr 2026

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 49 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Females aged ≥18 and ≤49 years and weighing ≥ 45.0 and ≤ 90.0 kg. 2. Males aged ≥18 and ≤49 years (no weight restrictions). 3. Able to provide proof of identity to the satisfaction of the study clinician completing the enrollment process. 4. In good general health and without clinically significant medical history. 5. Able to provide informed consent. 6. Willing to have blood samples and data stored for future research. 7. Resides in or near Kalifabougou, Faladje, or Torodo, Mali, and available for the duration of the study. 8. Females of childbearing potential must be willing to use reliable contraception from 21 days prior to study Day 0 through the final study visit as described below. 1. Reliable methods of birth control include 1 of the following: confirmed pharmacologic contraceptives via parenteral delivery or intrauterine or implantable device. Exclusion Criteria: 1. Pregnancy, as determined by a positive urine or serum beta-human choriogonadotropin (β hCG) test (if female). 2. Currently breastfeeding. 3. Behavioral, cognitive, or psychiatric disease that in the opinion of the investigator affects the ability of the participant to understand and comply with the study protocol. 4. Study comprehension examination score of \<80% correct or per investigator discretion. 5. Hemoglobin, WBC, absolute neutrophil, or platelet count outside the local laboratory-defined limits of normal. (Participants may be included at the investigator's discretion for "not clinically significant" values.) 6. Alanine transaminase (ALT) or creatinine (Cr) level above the local laboratory-defined upper limit of normal. (Participants may be included at the investigator's discretion for "not clinically significant" values.) 7. Infected with HIV, hepatitis C virus (HCV), or hepatitis B virus (HBV). 8. Known or documented sickle cell disease by history. (Note: Known sickle cell trait is NOT exclusionary.) 9. Clinically significant abnormal electrocardiogram (ECG; QTc \>460 or other significant abnormal findings, including unexplained tachycardia or bradycardia). 10. Evidence of clinically significant neurologic, cardiac, pulmonary, hepatic, endocrine, rheumatologic, autoimmune, hematological, oncologic, or renal disease by history, physical examination, and/or laboratory studies including urinalysis. 11. Receipt of any investigational product within the past 30 days. 12. Participation or planned participation in an interventional trial with an investigational product until the last required protocol visit. \[Note: Past, current, or planned participation in observational studies is NOT exclusionary; participation in the placebo arm of the Mali adult CIS43LS MAb trial (ClinicalTrials.gov Identifier: NCT04329104) or the placebo arm of the Mali adult L9LS Mab trial (ClinicalTrials.gov Identifier: NCT05816330) is NOT exclusionary.\] 13. Medical, occupational, or family problems as a result of alcohol or illicit drug use during the past 12 months. 14. History of a severe allergic reaction or anaphylaxis. 15. Severe asthma (defined as asthma that is unstable or required emergent care, urgent care, hospitalization, or intubation during the past 2 years, or that has required the use of oral or parenteral corticosteroids at any time during the past 2 years). 16. Pre-existing autoimmune or antibody-mediated diseases including but not limited to: systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, Sjögren's syndrome, or autoimmune thrombocytopenia. 17. Salivary gland disorder diagnosed by a doctor (e.g., parotitis, sialadenitis, sialolithiasis, salivary gland tumors). 18. Known immunodeficiency syndrome. 19. Known asplenia or functional asplenia. 20. Use of chronic (≥14 days) oral or IV corticosteroids (excluding topical or nasal) at immunosuppressive doses (i.e., prednisone \>10 mg/day) or immunosuppressive drugs within 30 days of day 0. 21. Receipt of a live vaccine within the past 4 weeks or a killed vaccine within the past 2 weeks prior to study agent administration. 22. Receipt of immunoglobulins and/or blood products within the past 6 months. 23. Previous receipt of an investigational malaria vaccine or MAb in the last 5 years. 24. Known allergies or contraindication against artemether lumefantrine. 25. Other condition(s) that, in the opinion of the investigator, would jeopardize the safety or rights of a participant participating in the trial, interfere with the evaluation of the study objectives, or render the participant unable to comply with the protocol.

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Locations

  • Faladje MRTC Clinic

    Faladié, Koulikoro, Mali

  • Kalifabougou MRTC Clinic

    Kalifabougou, Koulikoro, Mali

  • Torodo MRTC Clinic

    Torodo, Koulikoro, Mali

More trials for these conditions

Other studies related to the condition(s) this trial covers.