People with O blood type may have lower risk of COVID-19 infection, studies suggest
PTI, Oct 16, 2020, 3:47 PM IST
London: People with O blood type may have a lower risk of infection from the SARS-CoV-2 virus, that causes COVID-19, and reduced likelihood of severe outcomes, including organ complications, if they develop the disease, two new studies suggest.
The studies, published in the journal Blood Advances on Wednesday, add evidence that there may be an association between blood type and vulnerability to COVID-19.
However, the researchers noted that more studies are needed to better understand why and what it means for patients.
In the first study, researchers compared Danish health registry data from over 473,000 individuals tested for COVID-19 to data from a control group of more than 2.2 million people from the general population.
Among the COVID-19 positive, they found fewer people with O blood type and more people with A, B and AB types. The study suggests that people with blood types A, B or AB may be more likely to be infected with COVID-19 than people with type O.
The researchers did not find any significant difference in the rate of infection between A, B and AB types.
Since blood group distributions vary among ethnic subgroups, the researchers also controlled for ethnicity and maintained that fewer people with O blood type tested positive for the virus.
“It is very important to consider the proper control group because blood type prevalence may vary considerably in different ethnic groups and different countries,” said study author Torben Barrington, from the University of Southern Denmark.
A separate retrospective study in Canada found that people with blood groups A or AB appear to exhibit greater COVID-19 disease severity than people with blood groups O or B.
The researchers examined data from 95 critically ill COVID-19 patients hospitalised in Vancouver.
The team found that patients with blood groups A or AB were more likely to require mechanical ventilation, suggesting that they had greater rates of lung injury from COVID-19.
The researchers also found more patients with blood group A and AB required dialysis for kidney failure.
These findings, taken together, suggest that patients in these two blood groups may have an increased risk of organ dysfunction or failure due to COVID-19 than people with blood types O or B.
While people with blood types A and AB did not have longer overall hospital stays than those with types O or B they did remain in the intensive care unit (ICU) for a longer average time, which may also signal a greater COVID-19 severity level, the researchers said.
Udayavani is now on Telegram. Click here to join our channel and stay updated with the latest news.
Surendra Bantwal murder case: Two arrested
UN: Nuclear weapons ban treaty to enter into force
President greets citizens on eve of Dussehra
Related Articles More
Remdesivir becomes first drug to be fully approved for COVID-19 by US: All you need to know
Scientists accidentally discover new organ in human throat
IIT Kharagpur unveils its Covid-19 test COVIRAP: All you need to know
Half of working adults worried about jobs, 2/3rd expect employers to help them retrain: WEF
Almost 5 lakh newborns killed due to air pollution in 2019
Suicide bombing in Kabul kills 18, including children
K’taka HC directs Franklin Templeton to restrain from winding up schemes without investors’ consent
MP bypolls: Congress, BJP slug it out as campaign heats up
Deeply value friendship with India: Biden
We’re trying to make winning a habit, says Rahul