History of Changes for Study: NCT04516746
Phase III Double-blind, Placebo-controlled Study of AZD1222 for the Prevention of COVID-19 in Adults
Latest version (submitted March 10, 2023) on
  • A study version is represented by a row in the table.
  • Select two study versions to compare. One each from columns A and B.
  • Choose either the "Merged" or "Side-by-Side" comparison format to specify how the two study versions are to be displayed. The Side-by-Side format only applies to the Protocol section of the study.
  • Click "Compare" to do the comparison and show the differences.
  • Select a version's Submitted Date link to see a rendering of the study for that version.
  • The yellow A/B choices in the table indicate the study versions currently compared below. A yellow table row indicates the study version currently being viewed.
  • Hover over the "Recruitment Status" to see how the study's recruitment status changed.
  • Study edits or deletions are displayed in red.
  • Study additions are displayed in green.
Study Record Versions
Version A B Submitted Date Changes
1 August 17, 2020 None (earliest Version on record)
2 October 29, 2020 Recruitment Status, Contacts/Locations, Study Status, Outcome Measures, Eligibility, Arms and Interventions and Study Design
3 November 11, 2020 Contacts/Locations and Study Status
4 December 1, 2020 Study Status, Contacts/Locations and Study Design
5 January 11, 2021 Contacts/Locations, Outcome Measures, Study Status, Arms and Interventions and Study Design
6 February 22, 2021 Recruitment Status, Contacts/Locations, Study Status, Outcome Measures, Study Design and Study Identification
7 March 8, 2021 Study Status and Outcome Measures
8 April 12, 2021 Study Status and Contacts/Locations
9 July 1, 2021 Study Status and Contacts/Locations
10 November 19, 2021 Contacts/Locations, Study Status, Outcome Measures and Arms and Interventions
11 February 16, 2022 Study Status
12 March 3, 2022
Quality Control Review has not concluded Returned: March 18, 2022
Outcome Measures, Study Status, Document Section and References
13 March 31, 2022 Study Status, Adverse Events
14 July 13, 2022 Contacts/Locations and Study Status
15 October 6, 2022 Study Status and Contacts/Locations
16 January 3, 2023 Study Status
17 March 10, 2023 Recruitment Status and Study Status
Comparison Format:

U.S. National Library of Medicine | U.S. National Institutes of Health | U.S. Department of Health & Human Services