A Covid infection has a 'much higher' risk of blood clots than vaccines do, study finds
People infected with Covid-19 face a much greater risk of developing dangerous blood clots than people receiving a Pfizer or AstraZeneca coronavirus vaccine, according to a large studyFriday, underscoring the benefits of vaccination even if they pose limited risks of adverse events. ... [+]Using data from some 29 million people in the U.K.
For every 10 million people receiving their first Pfizer shot, the data showed there would be 143 more cases of ischaemic stroke, compared to around 1,699 for 10 million people after infection. There would be around 107 additional cases of thrombocytopenia—a form of rare blood clotting—and 66 cases of venous blood clots for every 10 million having their first AstraZeneca shot, according to the data, versus around 934 and 12,614 extra cases respectively for the same number of people after a Covid-19 infection.
The risks associated with the Covid-19 vaccines are also relatively short-lived, the researchers found, while the risks from a coronavirus infection are more prolonged. Though the vaccines can increase the likelihood of developing blood clots, the researchers said their findings underscore the importance of getting vaccinated to reduce this risk, given the higher risks with Covid-19.Dr Peter English, a retired communicable disease specialist and the former chair of the BMA’s public health medicine committee,: “This is a very important paper…[which] shows clearly that you are far more likely to suffer these adverse events if you get Covid-19.
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Covid Infection Has ‘Much Higher’ Risk Of Blood Clots Than Vaccines Do, Study FindsI am a London-based reporter for Forbes covering breaking news. Previously, I have worked as a reporter for a specialist legal publication covering big data and as a freelance journalist and policy analyst covering science, tech and health. I have a master’s degree in Biological Natural Sciences and a master’s degree in the History and Philosophy of Science from the University of Cambridge. Follow me on Twitter theroberthart or email me at rhartforbes.com
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