NCT04811391 (COVEAL) is a clinical trial of COVID-19 vaccine in Covid19, sponsored by Institute of Public Health, Albania.

Who is sponsoring NCT04811391?

NCT04811391 is sponsored by Institute of Public Health, Albania.

What drugs are being tested in NCT04811391?

Interventions in NCT04811391: COVID-19 vaccine.

Is NCT04811391 still recruiting?

NCT04811391 is currently status unknown. Last updated 26 March 2021.

Last reviewed 2021-03-26 · How we verify

NCT04811391: COVEAL

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

COVID-19 Vaccine Effectiveness in Albanian Health Workers

Status unknown Last updated 26 March 2021

What this trial tests

trial testing COVID-19 vaccine in Covid19 in 1,500 participants. Status unknown.

Timeline

19 February 2021

Primary endpoint
20 May 2022

20 May 2022

Quick facts

Lead sponsor	Institute of Public Health, Albania
Status	Status unknown
Study type	OBSERVATIONAL
Enrollment	1,500
Start date	19 February 2021
Primary completion	20 May 2022
Estimated completion	20 May 2022
Sites	3 locations across Albania

Drugs / interventions tested

COVID-19 vaccine (COVID-19 Vaccine) — full drug profile →

Conditions studied

Covid19 — all drugs for Covid19 →

Sponsor

Institute of Public Health, Albania

Who can join

16 and older, any sex, with Covid19. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

The purpose of this study is to evaluate the effectiveness of the COVID-19 vaccine in hospital based HWs in Albania. This will answer critical questions about the real-world performance of COVID-19 vaccines in one of the key target groups for vaccination.

Publications & conference data

7 peer-reviewed publications reference this trial (live from Europe PMC):

Factors associated with receipt of COVID-19 vaccination and SARS-CoV-2 seropositivity among healthcare workers in Albania (February 2021-June 2022): secondary analysis of a prospective cohort study.
Jorgensen P, Schmid A, Sulo J, Preza I, et al · · 2023 · cited 8× · PMID 37013112 · DOI 10.1016/j.lanepe.2023.100584
COVID-19 vaccine effectiveness among healthcare workers in Albania (COVE-AL): protocol for a prospective cohort study and cohort baseline data.
Sridhar S, Fico A, Preza I, Hatibi I, et al · · 2022 · cited 6× · PMID 35321895 · DOI 10.1136/bmjopen-2021-057741
Primary series COVID-19 vaccine effectiveness among healthcare workers in Albania, February-December 2021.
Rubin-Smith JE, Castro MYR, Preza I, Hasibra I, et al · · 2023 · cited 3× · PMID 37317681 · DOI 10.1016/j.ijregi.2023.04.009
Sociodemographic and Occupational Factors Associated With COVID-19 Vaccine and Influenza Vaccine Uptake Among Healthcare Workers, in Albania, 2022-2023: A Multicenter Study.
Xhaferi A, Bino S, Daja R, Vasili A, et al · · 2025 · cited 1× · PMID 40459287 · DOI 10.1093/cid/ciaf202
Primary Series and Booster Coronavirus Disease 2019 Vaccine Effectiveness in a Cohort of Healthcare Workers in Albania During a BA.1 and BA.2 Variant Period, January-May 2022.
Finci I, Rojas Castro MY, Hasibra I, Sulo J, et al · · 2023 · cited 1× · PMID 37885795 · DOI 10.1093/ofid/ofad479
Primary series and booster COVID-19 vaccine effectiveness in a cohort of healthcare workers in Albania during a BA.1 and BA.2 variant period, January – May 2022
Finci I, Rojas Castro MY, Hasibra I, Sulo J, et al · · 2023 · cited 1× · DOI 10.1101/2023.05.05.23289503
Primary Series COVID-19 Vaccine Effectiveness Among Health Care Workers in Albania, February–December 2021
Rubin-Smith J, Castro MYR, Preza I, Hasibra I, et al · · 2022 · DOI 10.2139/ssrn.4282932

Verify or expand the search:

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Trials testing the same drug.

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Other recruiting trials for Covid19

Currently open trials in the same condition.

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NCT06482138 — Dysfunction of Olfaction After COVID-19 Infection: Morphological and Histomolecular Investigation · NA · recruiting
NCT04924803 — Community Developed Technology-Based Messaging to Increase COVID-19 Vaccine Uptake Among People Who Inject Drugs · NA · active not recruiting
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NCT04806061 — Urine Alkalinisation in COVID-19 · NA · active not recruiting

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT04811391 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Institute of Public Health, Albania
Last refreshed: 26 March 2021

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT04811391.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing