Jonathan Sterne, co-author of the study, and Professor of Medical Statistics and Epidemiology at the University of Bristol, said: “We are reassured that the risk drops quite quickly – particularly for heart attacks and strokes – but the finding that it remains elevated for some time highlights the longer-term effects of COVID-19 that we are only beginning to understand.
The risk of clotting after a Covid-19 infection is “much higher” than the risk of clotting after a Covid-19 vaccination, according to researchers.
A study published last year in the British Medical Journal understood that people vaccinated with the Astrazeneca jab were at higher risk of thrombocytopenia and venous thromboembolism. People were at higher risk of an arterial blood clot following the Pfizer vaccine. But the risk of a blood clot is far higher from the virus itself.
Julia Hippisley-Cox, Professor of Clinical Epidemiology and General Practice at the University of Oxford, who authored a study analysing the risk of blood clots from the Astra-Zeneca vaccine, said: “People should be aware of these increased risks after Covid-19 vaccination and seek medical attention promptly if they develop symptoms, but also be aware that the risks are considerably higher and over longer periods of time if they become infected with SARS-CoV-2.”