British health journal BMJ Public Health has retracted a 2024 paper that suggested COVID-19 vaccination could have contributed to excess deaths during the pandemic caused by the SARS-CoV-2 virus.Published on May 6, 2024, by researchers at the Netherlands-based Princess Máxima Centre, the paper was retracted on August 11, 2026, following concerns over its discussion of the possible causes of excess mortality.The retraction notice cited “misinformation in the discussion regarding the possible causes of excess mortality” and said the paper did not sufficiently describe the limitations of the authors’ work.What Did the Paper Claim?The paper analyzed data from the “Our World in Data” database and the World Mortality Dataset to examine excess deaths during the pandemic.It questioned whether COVID-19 containment measures and vaccination could have contributed to continued excess mortality in some regions. However, the authors did not establish a link between COVID-19 vaccines and excess deaths. Instead, they called for more data to investigate the possible causes, AFP reported.About a month after publication, BMJ Public Health issued an expression of concern, stating that the study “does not establish any such link.”Despite that clarification, the paper was subsequently cited by vaccine-sceptic publications as evidence of a connection between COVID-19 vaccination and excess mortality. Paper Cited in US Senate HearingEven as the BMJ Group investigated the paper, Mostert, one of its original authors, had resigned from the Princess Máxima Centre.In June 2026, she appeared before a US Senate subcommittee, where she claimed that her research had been sabotaged.The Princess Máxima Centre had previously “emphatically” distanced itself from the publication and stated that it “strongly supports vaccination.”The BMJ Group said the retraction was supported by two of the four authors and by the Princess Máxima Centre.Critics Raised ConcernsCritics raised concerns about the paper’s treatment of evidence relating to vaccines, including alleged misquotes and omissions, and described parts of the discussion as inappropriate.Ariel Karlinsky, an economist at Hebrew University in Jerusalem and co-creator of the World Mortality Dataset, repeatedly contacted the journal from June 2024 seeking a retraction.Karlinsky said the analysis misused his data and “copied whole blocks of text and mathematical notation,” according to Retraction Watch.Investigation Found CarelessnessThe Princess Máxima Centre investigated authors Minke Huibers and Gertjan Kaspers in 2024. Mostert’s work was not examined because she was “not able to cooperate with the investigation.”An anonymised summary of the January 2025 report was published alongside the retraction. It found no research misconduct but concluded that Kaspers and Huibers had demonstrated “carelessness, ignorance and negligence.”The report also found that the paper gave disproportionate attention to COVID-19 measures and vaccination as possible causes of excess mortality while largely overlooking alternative explanations. It said the paper “misleadingly and unilaterally cites literature that supports its own arguments.”Kaspers and Huibers, along with their institution, requested the paper’s retraction, citing concerns that it was being misinterpreted and could pose a public health risk. However, they disagreed with the journal’s conclusion that the paper contained misinformation.