Phase III Double-blind Placebo-controlled Study of AZD1222 for the Prevention of COVID-19 in Adults

  • End date
    Feb 21, 2023
  • participants needed
  • sponsor
Updated on 17 January 2021
AstraZeneca Clinical Study Information Center
Primary Contact
Research Site (9.7 mi away) Contact
+92 other location


The aim of the study is to assess the safety, efficacy, and immunogenicity of AZD1222 for the prevention of COVID-19.


The COVID-19 pandemic has caused major disruption to healthcare systems with significant socioeconomic impacts. Currently, there are no specific treatments available against COVID-19 and accelerated vaccine development is urgently needed. A safe and effective vaccine for COVID-19 prevention would have significant public health impact.

Treatment Placebo, AZD1222
Clinical Study IdentifierNCT04516746
Last Modified on17 January 2021

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Inclusion Criteria

Is your age between 18 yrs and 130 yrs?
Gender: Male or Female
Do you have any of these conditions: Covid-19 or *COVID-19 or SARS-CoV-2?
Do you have any of these conditions: Covid-19 or SARS-CoV-2 or *COVID-19?
Do you have any of these conditions: Covid-19 or Sars Cov 2 or SARS-CoV-2 or *COVID-19?
Do you have any of these conditions: *COVID-19 or Covid-19 or SARS-CoV-2 or Sars Cov 2?
Do you have any of these conditions: *COVID-19 or SARS-CoV-2 or Sars Cov 2 or Covid-19?
Do you have any of these conditions: SARS-CoV-2 or Sars Cov 2 or Covid-19 or *COVID-19?
Increased risk of SARS-CoV-2 infection
Medically stable

Exclusion Criteria

confirmed or suspected immunosuppressive or immunodeficient state
significant disease, disorder, or finding
Prior or concomitant vaccine therapy for COVID-19
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How to participate?

Step 1 Connect with a site
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

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Step 2 Get screened

Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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Step 3 Enroll in the clinical study

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Step 4 Get your study results

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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