Kay Allison "Kate" Shemirani[1] (born 1965)[2] is a British conspiracy theorist, anti-vaccine activist and former nurse who lost her licence to practise in 2020 for misconduct.

[5] Shemirani has been described by The Jewish Chronicle as a leading figure of a movement that includes conspiracy theorists as well as far-left and far-right activists.

[7] She was suspended by the Nursing and Midwifery Council (NMC) in July 2020, in response to complaints that she was spreading conspiracy theories and misinformation about COVID-19 and about vaccines,[8][9] and struck off (with a right to appeal after five years) in May 2021.

She has presented her views at events alongside other conspiracy theorists such as David Icke, Piers Corbyn and Mark Steele.

"[12] Shemirani has been suspended from Facebook several times for promoting harmful misinformation to her 54,000 followers, including linking the 5G mobile network to the COVID-19 pandemic.

[13] According to Hope Not Hate, who monitor online racism and conspiracy theories, her Facebook page describes the 9/11 attacks as a false flag, Satanic messages in music videos and the organised destruction of the nuclear family.

"[18] The Jewish Chronicle investigated Shemirani and found that online she made references to Hitler and the Nazis when describing the COVID-19 pandemic lockdown and the NHS.

Protestors chanting "choose your side" formed a human blockade in order to prevent police actions and initially forced officers to retreat.

[24] On 1 March 2021, the Metropolitan Police reported that they had charged Shemirani with 6 breaches of the UK Coronavirus regulations along with fellow activist Piers Corbyn.

[30] Her son Sebastian has called for the police to take action and to prosecute his mother because he believes that her remarks pose an immediate risk to the lives of the doctors and nurses in the United Kingdom.

[31] On 30 August 2021, an anti-vaccine protest led by Shemirani was followed by the temporary closure of a vaccination facility in Churchill Square, Brighton after a smoke-bomb was set-off in the nearby shopping centre.

She stated in an interview that her ex-husband had taught her about the Committee of 300, she explained that he gave her "an education in the New World Order, of the illuminati, the top families, who owns what.

Shemirani promotes narratives that universal religious persecution operation exists and that a large-scale conspiracy by the global elite is perpetrating the sexual abuse of children.

[6][19] In May, she was interviewed for the American health website Vibe and espoused a conspiracy theory concerning the marriage of Imran Khan and Jemima Goldsmith.

In 2023 The Boston Globe noted that Shemarani was one of a group of wellness conspiracy-theory promoters who had recently shifted to anti-trans rhetoric.For Sherimani and other conspiracy theorists, moving from vaccine skepticism to transphobic dread lets them keep their focus on saving innocent children from supposedly amoral doctors.

They can blow past the nuanced complexities around youth health care and women’s sports with spiritualized culture war battle cries for what they see as a back-to-nature crusade.

[35] Shemirani's interim suspension was confirmed on 20 July 2020 in a hearing in which she was assisted by fellow conspiracy theorist Mark Steele who acted as her McKenzie friend.

[36] The reason for the suspension was to avoid risks of public harm,[5] for promoting anti-vaccination and 5G networking conspiracy theories and claiming that the COVID-19 pandemic is a scam.

Shemirani referred to nurses who carry out vaccinations as Nazis and to those who recognise the gravity of the pandemic as "complicit in the tyranny and lies".

[40][better source needed] Her son Sebastian gave an interview to Marianna Spring on 24 October 2020 about his mother, broadcast on the BBC World Service.

[41] During the interview, he told Spring that he contacted the BBC because he is worried that his mother's claims and ideas are "dangerous" and could have an impact on public health.

[14] In June 2021, Sebastian told BBC Radio 4's Today programme that his mother is "very dangerous" and has called for the police to prosecute her after she compared the nurses and doctors in the UK to Nazi war criminals who were hanged at the Nuremberg Trials.