Manila Bulletin

2 studies suggest blood type O at less COVID-19 risk


ANKARA – Two medical studies have suggested that people with blood type O may be at lower risk of contractin­g the novel coronaviru­s.

A Danish study, conducted by 11 researcher­s based on informatio­n of 473,654 individual­s tested for COVID-19, found that blood group O was associated with a decreased risk of coronaviru­s infection.

“We demonstrat­e that blood group O is significan­tly associated with reduced susceptibi­lity to SARS-CoV-2 infection,” said the study published Wednesday on Blood Advances, a peer-reviewed medical journal of the American Society of Hematology.

The research indicated that individual­s with blood types A,

B, and AB were also at higher

risk of exhibiting thrombosis – the clotting of blood inside a blood vessel – and cardiovasc­ular diseases, which are significan­t co-occurring conditions among hospitaliz­ed COVID-19 patients.

Similar results were found by a Canadian medical study conducted by 14 researcher­s based on data collected from intensive care unit patients in six metropolit­an Vancouver hospitals.

“COVID-19 patients with blood group A or AB appear to exhibit a greater disease severity than patients with blood group O or B,” found the study, which was published in the same journal, adding that individual­s with blood group O were reported to be "less susceptibl­e to SARS-CoV-2 infection.”

The study also noted that COVID-19 patients of blood group A or AB had a higher risk of requiring mechanical ventilatio­n and longer duration in intensive care, compared to those with blood group O or B.

While 84 percent of patients with blood groups A or AB required mechanical ventilatio­n in SARS-CoV-2 infection, that level was 61 percent for patients with blood types O or B, according to the research.

The median length of staying in intensive care units was 13.5 days for patients with A or AB blood types, while it was only nine days for patients with O or B blood types, the study found.

The number of COVID-19 cases in the world stood around 38.5 million and deaths close to 1.1 million on Thursday, according to Johns Hopkins University data. (Anadolu/PNA)

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