Updated Illustrated Risk Guide for blood clots associated with the Astra Zeneca COVID-19 vaccine – Winton Centre for Risk and Evidence Communication

This information is from 6th May 2021 – about data up until 28th April 2021 from the MHRA in the UK.

Statistical analysis from the University of Cambridge on the risk of adverse reactions to the AZ vaccine.

Images presented show data for both sexes there is a more detailed breakdown for males and females in the report linked.

They reported:

We have also looked at the data broken down by sex. Currently the MHRA data shows no statistically significant difference between the likelihood of men or women developing the specific blood clots – although there are slightly more cases in women than men, this could be due to chance variation, or possibly under-reporting amongst men. As more data comes in, this potential difference will be closely monitored. By contrast, the potential benefits to men and women, particularly over the age of around 40, do differ, with men receiving a greater potential benefit because they are more at risk of a poor outcome from COVID-19

Very Low Exposure Risk

Low Exposure Risk

Medium Exposure Risk

High Exposure Risk