We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Phase III Double-blind, Placebo-controlled Study of AZD7442 for Post- Exposure Prophylaxis of COVID-19 in Adults (STORM CHASER)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT04625972
Recruitment Status : Completed
First Posted : November 12, 2020
Results First Posted : October 25, 2022
Last Update Posted : October 25, 2022
Iqvia Pty Ltd
Information provided by (Responsible Party):

Brief Summary:
This study will assess the efficacy of AZD7442 for the post-exposure prophylaxis of COVID-19 in Adults.

Condition or disease Intervention/treatment Phase
COVID-19 Drug: AZD7442 Drug: Placebo Phase 3

Detailed Description:
SARS-CoV-2 is the causative agent of the ongoing COVID-19 pandemic that, as of 29 September 2020, has resulted in a high death toll to date. Unlike the majority of coronaviruses that cause mild disease in humans and animals, SARS-CoV-2 can replicate in the lower respiratory tract to cause acute respiratory distress syndrome and fatal pneumonia. Effective interventions to prevent or treat COVID-19 remain limited in number and clinical experience is limited. Clinical management is limited to supportive care, consequently overwhelming resources of healthcare systems around the world. As a response to the ongoing pandemic, AstraZeneca is developing mAbs to the SARS-CoV-2 S protein. The SARS-CoV-2 spike protein contains the virus's RBD, which enables the virus to bind to receptors on human cells. By targeting this region of the virus's spike protein, antibodies can block the virus's attachment to human cells, and, therefore, is expected to block infection. Amino acid substitutions have been introduced into the antibodies to both extend their half-lives, which should prolong their potential prophylactic benefit, and decrease Fc effector function in order to decrease the potential risk of antibody-dependent enhancement of disease. AZD7442, a combination of 2 of these mAbs (AZD8895 and AZD1061), is being evaluated for administration to prevent and/or treat COVID-19. There is currently one ongoing Phase I study with AZD7442.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 1132 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Prevention
Official Title: A Phase III Randomized, Double-blind, Placebo-controlled, Multi-center Study in Adults to Determine the Safety and Efficacy of AZD7442, a Combination Product of Two Monoclonal Antibodies (AZD8895 and AZD1061), for Post-exposure Prophylaxis of COVID-19
Actual Study Start Date : December 2, 2020
Actual Primary Completion Date : April 7, 2021
Actual Study Completion Date : July 25, 2022

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: AZD7442
Participants will be randomized in a 2:1 ratio to receive a single dose (× 2 IM injections) of either 300 mg of AZD7442 (n = approximately 750) or saline placebo (n = approximately 375) on Day 1.
Drug: AZD7442
Single dose (× 2 IM injections) of 300 mg of AZD7442 on Day 1.
Other Name: A combination of 2 mAbs (AZD8895 and AZD1061)

Placebo Comparator: Placebo
Participants will be randomized in a 2:1 ratio to receive a single dose (× 2 IM injections) of either 300 mg of AZD7442 (n = approximately 750) or saline placebo (n = approximately 375) on Day 1.
Drug: Placebo
Single dose (× 2 IM injections) of saline placebo on Day 1.

Primary Outcome Measures :
  1. Number of Participants With First Case of SARS-CoV-2 RT-PCR Positive Symptomatic Illness [ Time Frame: Planned to be evaluated through Day 183, however, the number of participants required was achieved 127 days after the study start date ]
    To estimate the efficacy of a single IM dose of AZD7442 compared to placebo for the prevention of COVID-19

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 120 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. ≥ 18 years of age at the time of signing the informed consent
  2. Adults with potential exposure, within 8 days, to a specific identified individual with laboratory-confirmed SARS-COV-2 infection, symptomatic or asymptomatic
  3. Participants must not have had COVID-19 symptoms within 10 days of dosing
  4. Negative result from point of care SARS-CoV-2 serology test at screening
  5. Contraception used by women of childbearing potential, condom by men
  6. Able to understand and comply with study requirements/procedures based on the assessment of the investigator

Exclusion Criteria:

  1. History of laboratory-confirmed SARS-CoV-2 infection or SARS-CoV-2 seropositivity at screening.
  2. History of infection with severe acute respiratory syndrome (SARS) or Middle East respiratory syndrome (MERS).
  3. Known history of allergy or reaction to any component of the study drug formulation.
  4. Previous hypersensitivity, infusion-related reaction, or severe adverse reaction following administration of a mAb.
  5. Any prior receipt of investigational or licensed vaccine or other mAb/biologic indicated for the prevention of SARS-CoV-2 or COVID-19 or expected receipt during the period of study follow up.
  6. Clinically significant bleeding disorder or prior history of significant bleeding or bruising following IM injections or venipuncture.
  7. Any other significant disease, disorder, or finding that, in the judgement of the investigator, may significantly increase the risk to the participant because of participation in the study, affect the ability of the participant to participate in the study, or impair interpretation of the study data.
  8. Receipt of any IMP in the preceding 90 days or expected receipt of IMP during the period of study follow-up, or concurrent participation in another interventional study.
  9. Currently pregnant or breast feeding.
  10. Blood drawn in excess of a total of 450 mL (1 unit) for any reason within 30 days prior to randomization.
  11. Employees of the Sponsor involved in planning, executing, supervising, or reviewing the AZD7442 program, clinical study site staff, or any other individuals involved with the conduct of the study, or immediate family members of such individuals.
  12. In nations, states, or other jurisdictions that for legal or ethical reasons bar the enrollment of participants who lack capacity to provide their own informed consent, such subjects are excluded.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04625972

Show Show 57 study locations
Sponsors and Collaborators
Iqvia Pty Ltd
Layout table for investigator information
Principal Investigator: Myron Levin, MD AstraZeneca
  Study Documents (Full-Text)

Documents provided by AstraZeneca:
Study Protocol  [PDF] March 12, 2021
Statistical Analysis Plan  [PDF] April 7, 2021

Additional Information:
CDC. (Centers for Disease Control and Prevention). Coronavirus Disease 2019 (COVID-19), Symptoms of Coronavrus. https://www.cdc.gov/coronavirus/2019-ncov/symptoms-testing/symptoms.html. Published 2020. Accessed 01 July 2020.
WHO. WHO Coronavirus Disease (COVID-19) Dashboard. 2020a.
WHO. WHO R&D Blueprint COVID-19 Therapeutic Trial Synopsis Draft 18 February 2020. https://www.who.int/blueprint/priority-diseases/key-action/COVID-19_Treatment_Trial_Design_Master_Protocol_synopsis_Final_18022020.pdf. Published 2020b. Accessed 25 September 2020.

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
Responsible Party: AstraZeneca
ClinicalTrials.gov Identifier: NCT04625972    
Other Study ID Numbers: D8850C00003
First Posted: November 12, 2020    Key Record Dates
Results First Posted: October 25, 2022
Last Update Posted: October 25, 2022
Last Verified: October 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal. All request will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure
Supporting Materials: Study Protocol
Statistical Analysis Plan (SAP)
Time Frame: AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA Pharma Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure
Access Criteria: When a request has been approved AstraZeneca will provide access to the de-identified individual patient-level data in an approved sponsored tool . Signed Data Sharing Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information. Additionally, all users will need to accept the terms and conditions of the SAS MSE to gain access. For additional details, please review the Disclosure Statements at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure
URL: https://astrazenecagroup-dt.pharmacm.com/DT/Home

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: Yes
Keywords provided by AstraZeneca:
Post exposure COVID-19
Additional relevant MeSH terms:
Layout table for MeSH terms
Respiratory Tract Infections
Pneumonia, Viral
Virus Diseases
Coronavirus Infections
Coronaviridae Infections
Nidovirales Infections
RNA Virus Infections
Lung Diseases
Respiratory Tract Diseases