Achieving viral CLEARance in immunocompromised participants with long-term persistence of SARS-CoV-2 - an open-label randomized trial
EU CTIS ID: 2025-524442-10-00
What this study is testing
Assessment of viral clearance in immunocompromised participants with persistent SARS-CoV2 treated with antiviral combination treatment with nirmatrelvir/ritonavir and remdesivir on day 15 and day 22
- Therapeutic exploratory (Phase II)
A plain-language read of the study's public EU CTIS listing. The study team confirms the details.
Who can take part
You may be able to join if
- 1. Male or female participants ≥18 years of age.
- 2. Participants under an ongoing immunosuppression or a previous immunosuppression with an ongoing effect, defined by ≥ 1 of the following criteria: a. CAR-T-cell therapy or a hematologic stem cell transplant recipient within 2 years of treatment, with ongoing immunosuppressive therapy or residual immunodeficiency due to incomplete regeneration b. Moderate or severe primary immunodeficiency (e.g., DiGeorge syndrome, Wiskott- Aldrich syndrome) c. Use of at least 1 of the following immunosuppressive medications: Recent treatment with corticosteroids equivalent to prednisone ≥20 mg daily for at least 14 consecutive days, all of which must have been within the last 30 days prior to screening OR current treatment with ≥20 mg daily that must have been administered for at least 14 consecutive days at the time of screening. Active treatment causing significant immunosuppression, including alkylating agents, antimetabolites, transplant-related immunosuppressive drugs, cancer chemotherapeutic agents, TNF blockers, or other highly immunosuppressive drugs such as biologics. Previous or ongoing immunosuppressive treatment(s) resulting in residual immunodeficiency (e.g. hypogammaglobulinemia following anti-CD20 directed therapies). d. HIV infection with CD4+ cell count <200 mm3 from known medical history within the past 6 months of screening.
- 3. Documented SARS-CoV-2 persistence of at least 28 days in the pre-screening phase, defined as a sequence of laboratory-confirmed positive PCR results (defined as a PCR test with a cycle threshold (Ct) value of ≤30) from a nose swab or another respiratory material, that fulfils both of the following conditions: 1.) Duration: the total time elapsed between the first positive result (index test) and the second positive result confirming persistence (persistence test) is at least 28 days (additional tests may be performed between these two timepoints) and 2.) Continuity: all consecutive positive PCR tests following the persistence test, including the test confirming eligibility at screening (qualifying test), must be performed at intervals of no more than 21 days.
- 4. Willing and able to provide written informed consent.
- 5. Ability to understand the nature of the trial and the trial related procedures and to comply with them.
- 6. All female participants who are not pregnant at study entry, and who in the opinion of the investigator, are biologically capable of having children must agree to use a highly effective method of contraception consistently and correctly for at least 28 days after study completion. The following methods are considered highly effective: a. Combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation (oral intravaginal or transdermal). b. Progestogen-only hormonal contraception associated with inhibition of ovulation (oral, injectable or implantable). c. Intrauterine device (IUD). d. Intrauterine hormone-releasing system (IUS). e. Bilateral tubal occlusion. f. Vasectomized partner. g. Sexual abstinence.
You likely can't join if
- 1. Having received >5 consecutive days of nirmatrelvir/ritonavir for the current infection.
- 10. Previous participation in this trial.
- 11. Known or persistent abuse of medication, drugs, or alcohol.
- 12. Person who is in a relationship of dependence/employment with the sponsor or the investigator.
- 13. Persons deprived of liberty or placed in an institution by judicial or administrative order.
- 2. Having received >5 days consecutive days of remdesivir for the current infection.
See the full eligibility criteria
- 1. Male or female participants ≥18 years of age.
- 2. Participants under an ongoing immunosuppression or a previous immunosuppression with an ongoing effect, defined by ≥ 1 of the following criteria: a. CAR-T-cell therapy or a hematologic stem cell transplant recipient within 2 years of treatment, with ongoing immunosuppressive therapy or residual immunodeficiency due to incomplete regeneration b. Moderate or severe primary immunodeficiency (e.g., DiGeorge syndrome, Wiskott- Aldrich syndrome) c. Use of at least 1 of the following immunosuppressive medications: Recent treatment with corticosteroids equivalent to prednisone ≥20 mg daily for at least 14 consecutive days, all of which must have been within the last 30 days prior to screening OR current treatment with ≥20 mg daily that must have been administered for at least 14 consecutive days at the time of screening. Active treatment causing significant immunosuppression, including alkylating agents, antimetabolites, transplant-related immunosuppressive drugs, cancer chemotherapeutic agents, TNF blockers, or other highly immunosuppressive drugs such as biologics. Previous or ongoing immunosuppressive treatment(s) resulting in residual immunodeficiency (e.g. hypogammaglobulinemia following anti-CD20 directed therapies). d. HIV infection with CD4+ cell count <200 mm3 from known medical history within the past 6 months of screening.
- 3. Documented SARS-CoV-2 persistence of at least 28 days in the pre-screening phase, defined as a sequence of laboratory-confirmed positive PCR results (defined as a PCR test with a cycle threshold (Ct) value of ≤30) from a nose swab or another respiratory material, that fulfils both of the following conditions: 1.) Duration: the total time elapsed between the first positive result (index test) and the second positive result confirming persistence (persistence test) is at least 28 days (additional tests may be performed between these two timepoints) and 2.) Continuity: all consecutive positive PCR tests following the persistence test, including the test confirming eligibility at screening (qualifying test), must be performed at intervals of no more than 21 days.
- 4. Willing and able to provide written informed consent.
- 5. Ability to understand the nature of the trial and the trial related procedures and to comply with them.
- 6. All female participants who are not pregnant at study entry, and who in the opinion of the investigator, are biologically capable of having children must agree to use a highly effective method of contraception consistently and correctly for at least 28 days after study completion. The following methods are considered highly effective: a. Combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation (oral intravaginal or transdermal). b. Progestogen-only hormonal contraception associated with inhibition of ovulation (oral, injectable or implantable). c. Intrauterine device (IUD). d. Intrauterine hormone-releasing system (IUS). e. Bilateral tubal occlusion. f. Vasectomized partner. g. Sexual abstinence.
- 7. Female participants of childbearing potential must have a negative pregnancy test at Screening- V1 (serum test).
- 8. Female participants of childbearing potential must agree not to attempt to become pregnant AND agree not to donate ova. No contraception methods are required for male participants in this study, as the calculated safety margin is ≥100 fold between the estimated maternal exposure due to seminal transfer and the NOAEL for serious manifestations of developmental toxicity in nonclinical studies.
- 1. Having received >5 consecutive days of nirmatrelvir/ritonavir for the current infection.
- 10. Previous participation in this trial.
- 11. Known or persistent abuse of medication, drugs, or alcohol.
- 12. Person who is in a relationship of dependence/employment with the sponsor or the investigator.
- 13. Persons deprived of liberty or placed in an institution by judicial or administrative order.
- 2. Having received >5 days consecutive days of remdesivir for the current infection.
- 3. Having received >3 days of combination treatment of nirmatrelvir/ritonavir plus remdesivir for the current infection.
- 4. Current or expected use of medicinal products that are highly dependent on CYP3A for clearance and for which elevated plasma concentrations are associated with serious and/or life-threatening reactions, OR current or expected use of potent CYP3A inducers, OR recent usage of CYP3A4 inducers (see section 6.3.3)
- 5. Concomitant treatment with chloroquine or hydroxychloroquine.
- 6. AST or ALT > 5 times the upper limit of normality (ULN).
- 7. Known hypersensitivity to any of the study drugs, metabolites, or formulation excipient.
- 8. Known or planned pregnancy or breastfeeding during the conduct of the study and up to 28 days after study completion.
- 9. Simultaneous participation in other interventional trials which could interfere with this trial (simultaneous participation in registry and diagnostic trials is allowed).
The study team makes the final eligibility decision.
Questions & answers
Do participants get paid in this trial?
This listing doesn't specify compensation. Many trials still reimburse travel or offer a stipend, so it's worth asking the study team when you connect.
Is it free to join, and do I need insurance?
Searching and applying through BridgeMD is free. In clinical trials the study-related treatment and visits are generally provided at no cost to you. You usually don't need insurance to take part - confirm specifics with the study team.
How long does this study last?
The listing doesn't state an exact length. The study team walks you through the schedule and number of visits before you decide to enroll.
Who can join this trial?
This study is enrolling all sexes, 65+ years, 18-64 years. The study team makes the final eligibility decision.
Explore other conditions
BridgeMD is an information and trial-matching tool - not medical advice, and not the study sponsor. Details come from EU CTIS; the study team decides eligibility.