Category: covid-19

A paper that purported to find vitamin D could reduce the severity of COVID-19 symptoms has been retracted from PLOS ONE, four years after the journal issued an expression of concern about the research.

The article, “Vitamin D sufficiency, a serum 25-hydroxyvitamin D at least 30 ng/mL reduced risk for adverse clinical outcomes in patients with COVID-19 infection,” appeared online September 25, 2020. Michael F. Holick, a professor of medicine at Boston University and a proponent of the use of vitamin D, was the last author among a group of other researchers from the Tehran University of Medical Sciences in Iran. 

Soon after publication, the paper gained traction on platforms like Twitter (now X) as evidence vitamin D could treat COVID-19 symptoms.

Amidst this discussion, Nick Brown, a science integrity researcher at Linnaeus University in Växjö, Sweden, and Gideon Meyerowitz-Katz, a research fellow at the University of Wollongong, Australia, pointed out potential flaws with the work, including the small sample size of the study and a lack of patient information such as how the patients died.

A March 2020 paper that helped spur the discredited claim hydroxychloroquine could treat COVID-19 is under investigation – again – after some of its authors asked to take their names off the article. 

The lead author, retired researcher Didier Raoult, has 12 retractions, according to The Retraction Watch Database. Those retractions involved violations of ethics rules. Journals are investigating many other articles by Raoult and his colleagues, including their work on hydroxychloroquine as a treatment for COVID. 

The paper, “Hydroxychloroquine and azithromycin as a treatment of COVID-19: results of an open-label non-randomized clinical trial,” was published in the International Journal for Antimicrobial Agents. It has been cited more than 3,000 times, according to Clarivate’s Web of Science. 

We are pleased to present an excerpt from Thinking About Science: Good Science, Bad Science, and How to Make It Better by Ferric C. Fang and Arturo Casadevall, published by ASM Press/Wiley, October 2023.

Amidst the COVID-19 calamity, one can argue that science is one of the few aspects of the human response that has worked relatively well. However, despite the many advances in preventing and treating COVID-19, there have also been missteps as the world has scrambled to respond to a deadly new pathogen. It has been humbling for the U.S. to lead large high-income countries in per capita deaths from COVID-19 even with its wealth and scientific expertise. We are all too aware of the needless illnesses and deaths that have resulted from misguided political leadership, inadequate preparation, delayed responses, fragile supply chains, health disparities, and vaccine hesitancy. But we will not dwell on these issues here. Rather, we would like to review the COVID-19 pandemic through the prism of the 3R’s of research integrity: rigor, reproducibility, and responsibility. These form the fundamental pillars of the foundation of science. It is appropriate that we devote more attention to the foibles than to the successes so that we can learn from the mistakes and missed opportunities. What could have been done better? What needs to improve?

A controversial paper on the safety and immunogenicity of an Iran-made COVID-19 vaccine is being investigated by the U.S.-based publisher Wiley, Retraction Watch has learned.

Iran reportedly has already administered 3 million doses of the vaccine, dubbed Noora, which the country licensed for emergency use last year.

The paper describes the vaccine’s first test in humans, marking the only time results from the clinical development of the homegrown shot have been reported in international journals.

“Safety and immunogenicity of a recombinant receptor-binding domain-based protein subunit vaccine (Noora vaccine™) against COVID-19 in adults: A randomized, double-blind, placebo-controlled, Phase 1 trial” was published in 2022 in the Journal of Medical Virology, an achievement highlighted in Iranian news media. One report said the study showed a dose of 80 micrograms of the vaccine was “safe” and provided “adequate immunity in adults.” 

One of the first studies of long COVID has been retracted and replaced seven months after editors marked it with an expression of concern citing “data errors.” 

The original paper, “6-month consequences of COVID-19 in patients discharged from hospital: a cohort study,” was published in The Lancet in January 2021. It was “the first large cohort study with 6-months’ follow-up” of people hospitalized with COVID-19, according to an editorial published simultaneously, and has been cited more than 2,000 times, according to Clarivate’s Web of Science. The World Health Organization, for example, cited it in several documents. 

Last November, the article received an expression of concern stating that a researcher had contacted the journal about inconsistencies between that study and a paper published in August 2021, also in The Lancet, describing the same cohort of patients after one year of follow up. 

A journal has issued an expression of concern for an Australian study that supported mask mandates after researchers raised several potential problems with the design and methodology of the study.

The article, “The introduction of a mandatory mask policy was associated with significantly reduced COVID-19 cases in a major metropolitan city,” was published in the journal PLOS ONE in July 2021. It has been cited 12 times, according to Clarivate’s Web of Science. 

In comments to Retraction Watch, the authors of the paper stood by their work, but a key critic said he still thought the work should have been retracted.