To conduct their study, the researchers identified more than one million people in Sweden who were infected with SARS-Cov2 between February 1, 2020 and May 25, 2021, matched by age, sex and place of residence to more than four million people who had not tested positive for Covid.
They then calculated the rates of deep vein thrombosis, pulmonary embolism and bleeding in people who had Covid-19 during a control period and made comparisons with a control group.
According to the researchers, the increased risks observed during the first wave compared to the following two might be explained by the subsequent improvements in treatments and vaccination coverage in older patients.
For the researchers, these results justify the taking of measures aimed at preventing thrombotic events (such as the administration of treatments which prevent the formation of a clot in the blood vessels), in particular for patients at high risk, and reinforce the importance of vaccination once morest Covid-19.
