Covid-19 fact checks

This page brings together Full Fact’s fact checks on Covid-19, covering common claims, vaccine safety and efficacy, symptoms, treatments, government policies, and misinformation. We review evidence, correct errors, and monitor evolving science to help you make informed decisions.

6 October 2025

Daily Mail corrects article about Covid vaccines and cancer

The article wrongly said a study claimed to have found proof the vaccines raised the risk of getting several types of cancer.

8 September 2025

Covid vaccine claims at the Reform UK conference: fact checked

A cardiologist called Dr Aseem Malhotra, who we have fact checked before, made unevidenced and misleading claims at the event in Birmingham.

Doctor Aseem Malhotra delivers a speech on the second and final day of the Reform UK party conference at the NEC Birmingham

28 August 2025

Covid vaccines did not cause a 300% rise in cancer and miscarriage rates

Claims of sudden disease spikes in US military personnel in 2021 were based on an error in a government database.

19 August 2025

Robert F Kennedy Jr wrong about mRNA vaccines’ effectiveness

The US health secretary has cancelled research into mRNA vaccines, but his reasons seem to be based on bad information about their effectiveness.

Official portrait of Robert F. Kennedy Jr., the United States secretary of health and human services.

8 July 2025

Edited video of Pfizer CEO circulates again online

A clip of Albert Bourla, in which he appears to refer to a goal of reducing the number of people in the world by 50%, has been edited. He did not say this.

Chairman and CEO of Pfizer Albert Bourla

15 May 2025

No, the US Supreme Court has not ruled that Covid vaccines are ‘not vaccines’

Familiar misinformation about Covid vaccines being gene therapy is circulating again.

6 March 2025

The Covid-19 virus does exist

A post on Instagram features a woman making incorrect claims about the existence of Covid-19.

21 February 2025

A Covid vaccine made with HIV protein was trialled but never rolled out

A viral clip from a BBC documentary shows that an HIV protein was used in a Covid vaccine trial, but fails to mention the vaccine itself was scrapped soon afterwards.