Research is coalescing around the idea that people with Type O blood may have a slight advantage during this pandemic.
One of the new studies specifically found that COVID-19 patients with Type O or B blood spent less time in an intensive-care unit than their counterparts with Type A or AB. They were also less likely to require ventilation and less likely to experience kidney failure.
These new findings echo similar findings about Type O blood seen in previous research, creating a clearer picture of one particular coronavirus risk factor.
Patients with Type O or B blood had less severe COVID-19
Both new studies came out Wednesday in the journal Blood Advances. One looked at 95 critically ill COVID-19 patients at hospitals in Vancouver, Canada, between February and April.
They found that patients with Type O or B blood spent, on average, 4.5 fewer days in the intensive-care unit than those with Type A or AB blood. The latter group stayed, on average, 13.5 days in the ICU. The researchers did not see any link between blood type and the length of each patient’s total hospital stay, however.
They did, however, find that only 61 percent of the patients with Type O or B blood required a ventilator, compared to 84 percent of patients with Type A or AB.
Patients with Type A or AB, meanwhile, were also more likely to need dialysis, a procedure that helps the kidneys filter toxins from the blood.
“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,” the study authors concluded.
A June study found a similar link: Patients in Italy and Spain with Type O blood had a 50 percent reduced risk of severe coronavirus infection (meaning they needed intubation or supplemental oxygen) compared to patients with other blood types.
People with Type O blood had ‘reduced susceptibility’ to infection
The second new study found that people with Type O blood may be at a lower risk of getting he coronavirus in the first place relative to people with other blood types.
The team examined nearly half a million people in the Netherlands who were tested for COVID-19 between late February and late July. Of the roughly 4,600 people who tested positive and reported their blood type, 38.4 percent had Type O blood.
That’s lower than the prevalence of Type O in a population of 2.2 million Danish people, 41.7 percent, so the researchers determined that people with Type O blood had disproportionately avoided infection.
“Blood group O is significantly associated with reduced susceptibility,” the authors wrote.
Other studies found a similar link between blood type and COVID-19 risk
In general, your…