Guidance

COVID-19 vaccination: blood clotting information for healthcare professionals

Information for healthcare professionals on blood clotting following COVID-19 vaccination.

• From: UK Health Security Agency
• Published: 7 April 2021
• Last updated: 14 February 2022 — See all updates

Applies to England

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Information for healthcare professionals on blood clotting following COVID-19 vaccination

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Information for healthcare professionals on blood clotting following coronavirus (COVID-19) vaccination.

This publication is subject to extensive and regular revisions and we recommend linking to the latest version to ensure that you are giving the most up-to-date clinical advice and guidance.

Published 7 April 2021

Last updated 14 February 2022 + show all updates

1. 14 February 2022

   Updated to include information on the risk of relapse of thrombosis and thrombocytopenia symptoms and risk of new or relapse of immune thrombocytopenic purpura following COVID-19 vaccinations.

2. 3 September 2021

   Added print version.

3. 23 August 2021

   Updated guidance document.

4. 8 June 2021

   Updated to include: antiphospholipid syndrome, interchangeability of COVID-19 vaccines, samples required for whole genome sequencing and the latest MHRA data.

5. 7 May 2021

   Updated information for healthcare professionals on blood clotting following COVID-19 vaccination.

6. 9 April 2021

   Updated sections: 13, 14, 16, 17, 19, 21 and 22.

7. 8 April 2021

   Added print version.

8. 7 April 2021

   First published.