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“People with blood group A are at higher risk of being infected with COVID-19”
There is no proven link.
This is from a research paper states that it “reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice.”
This claim comes from a preprint in a research paper which clearly states that it “has not been peer-reviewed”, and “reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice.”
As a consequence, Sakthivel Vaiyapuri, Associate Professor in Cardiovascular & Venom Pharmacology at the University of Reading, writes that “to date, we don’t have robust scientific evidence to prove that our blood group has a direct relationship with COVID-19 infection”.
In particular, Dr Vayapuri highlights that “the researchers have also not explained why they failed to see a significant difference between the blood groups in the Shenzhen hospital. And given COVID-19 is a pandemic, the sample size that they have analysed is not sufficient to draw firm conclusions”.