People with the O blood group have a lower risk of contracting the new novel coronavirus.
The study by biotechnology company 23 and Me involved 7.5 million people, preliminary data of which have just been released.
Preliminary results show that people with O-blood group are 9% to 18% less likely to be contracted with coronavirus.
When the researchers looked at people who had a higher risk of contracting the virus, they found that the chances of being diagnosed with COVID-19 in O-blood group were 3.2% lower than in others, 3.9 in A-blood group, 3.9, in B-blood group it was 4% in group and 4.1% in AB blood group.
But a statement from the company acknowledged that research was still in its infancy.
The researchers said that in some reports, COVID-19 has been linked to blood clots and blood vessel diseases, suggesting that genes may play a role.
Earlier, research in Germany and Norway claimed that people with a certain blood group were at higher risk for the disease.
Research has shown that people with A blood group may have a higher risk of catching the coronavirus.
The study identified two sites in the human genome that increase the risk of respiratory failure in people with COVID-19, one of which was in the gene that determines blood type.
Research has shown that people with A blood group who have COVID-19 may be more likely to need oxygen or a ventilator.
However, Andre Frank, a professor of molecular medicine at the University of Kyle in Germany, who was involved in the study, said it was not necessary for a blood group to determine a person’s illness.
“Until now, we have not been able to differentiate between blood groups or certain genetic factors linked to blood group,” he said. Individuals are 50% more secure and those in Group A are 50 per cent more at risk.
The researchers collected blood samples from 1610 patients undergoing treatment in hospitals in Italy and Spain who needed oxygen or a ventilator. The DNA was collected from blood samples and scanned them by using a technique called genotyping.