Skip to main content

Top ten most-read COVID-19 articles in 2021, identified by the editors at Elsevier

The past year has seen an explosion in the volume of research and publishing on the coronavirus and COVID-19. According to LitCovid, a curated literature hub that tracks current scientific information on this topic, 2000 articles are added to PubMed each week.

Editors at Elsevier have identified the top 10 COVID-19 related articles accessed by physicians on ClinicalKey in 2021:

  1. Oxford–AstraZeneca COVID-19 vaccine efficacy. Knoll, Maria Deloria; Wonodi, Chizoba. The Lancet. 2021 Jan 9; 397(10269):72-74.
  2. 6-month consequences of COVID-19 in patients discharged from hospital: a cohort study. Huang, Chaolin, MD et al. The Lancet. 2021 Jan 16; 397(10270):220-232.
  3. Long-term follow-up of recovered patients with COVID-19. Cortinovis, Monica; Perico, Norberto; Remuzzi, Giuseppe. The Lancet. 2021 Jan 16; 397(10270):173-175.
  4. Long COVID: A Primer for Family Physicians. Greenhalgh, Trisha, BM BChir, MD, PhD, MBA; Knight, Matthew, MBBS, BSc, PGCert (Allergy) FRCP. American Family Physician. 2020 Dec 15; 102(12):716-717.
  5. Willingness to get the COVID-19 vaccine with and without emergency use authorization. Guidry, Jeanine P.D. et al. American Journal of Infection Control. 2021 Feb: 49(2) :137-142.
  6. Ivermectin in COVID-19: What do we know? Pandey, Sanjay et al. Diabetes & Metabolic Syndrome: Clinical Research & Reviews. Nov-Dec 2020; 14(6):1921-1922.
  7. Pathophysiological Basis and Rationale for Early Outpatient Treatment of SARS-CoV-2 (COVID-19) Infection. McCullough, Peter A. et al. The American Journal of Medicine. 2021 Jan; 134(1):16-22.
  8. Vertical transmission of coronavirus disease 2019: a systematic review and meta-analysis. Kotlyar, Alexander M., MD et al. American Journal of Obstetrics and Gynecology. 2021 Jan; 224(1):35-53.
  9. Infectivity of asymptomatic versus symptomatic COVID-19. Sayampanathan, Andrew A. et al. The Lancet. 2021 Jan 9; 397(10269):93-94.
  10. Neurological associations of COVID-19. Ellul, Mark A, MRCP; Benjamin, Laura, PhD et al. The Lancet Neurology. 2020 Sep ;19(9):767-783.


ClinicalKey user tip: stay current on COVID-19 and other clinical topics by activating your ClinicalKey account and setting up journal issue alerts. Learn more here.


About ClinicalKey

ClinicalKey provides access to evidence across 30+ specialties in a variety of formats, including full-text books and journals, point-of-care summaries, drug information, videos, practice guidelines, and customizable patient handouts.

Access to ClinicalKey, a tool valued at US$1,200 per year, is included with a CMA membership.

Do you have a question on COVID-19 or another clinical topic? Contact the Ask a Librarian team to request a literature search.

About the author(s)

CMA Joule’s medical librarians are the professionals behind “Ask a Librarian”, a service for all CMA members looking for clinical search expertise. This experienced team of librarians can support you by searching on your behalf, teaching you effective search strategies or training you to use our clinical resources.