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The second study involved 95 people who were critically ill with Covid-19 in Vancouver, Canada. It discovered that patients from the A and AB blood groups were more likely to require mechanical ventilation, suggesting that they had greater rates of lung injury from the virus. They were also more likely to require dialysis because of kidney failure.
The scientists also found that people with blood types A and AB remained in the intensive care unit (ICU) for longer on average than people from the other two blood groups. The Canadian team said this may also signal a greater Covid-19 severity level.
Lead author Dr Mypinder Sekhon, of the University of British Columbia, said: “Of particular importance as we continue to traverse the pandemic, we now have a wide range of survivors who are exiting the acute part of Covid-19, but we need to explore mechanisms by which to risk stratify those with longer-term effects.”
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