One blood type does NOT affect the risk of severe Covid, according to the study

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A person’s blood type does not affect the risk of developing severe Covid-19 or being hospitalized for the infection, according to one study.

Previous studies have indicated that people with type A blood are more likely to catch the coronavirus.

To determine if this was true, U.S. doctors analyzed the health records of more than 100,000 people who took a Covid-19 test in Utah, Idaho and Nevada between March and November 2020.

Cross-reference of their Covid status with the blood group revealed that there was no association between them, discrediting the previous findings.

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According to a study, people are more likely to get the coronavirus if they have type A blood. Laboratory-based analysis investigated previous reports that blood groups affect a person's susceptibility to SARS-CoV-2 infection

According to a study, people are more likely to get the coronavirus if they have type A blood. Laboratory-based analysis investigated previous reports that blood groups affect a person’s susceptibility to SARS-CoV-2 infection

Breakdown of the British by blood type

• The positive: 35%

• The negative: 13%

• A positive: 30%

• A negative: 8%

• Positive B: 8%

• Negative B: 2%

• AB positive: 2%

• Negative AB: 1%

Source: 900,000 blood donors to the NHS blood register and transplants

Blood type is a trait determined by a person’s DNA and depends on the versions of genes inherited from a person’s parents.

These genes dictate the presence of antigens on the surface of red blood cells, the donut-shaped vessels that carry oxygen around the body to the arteries and veins.

Antigens are protruding proteins and there are two versions, A and B, that are found on the surface of red blood cells, also known as erythrocytes.

Everyone has A, B, A and B, or none. Therefore, these people will have blood group A, B, AB and O, respectively, and this is known as the ABO blood group system.

Another antigen in the cells, called Rhesus, is positive or negative and this determines whether a person is, for example, positive or negative.

Blood groups vary by geography and ethnicity, but in the UK, the most common group is O positive, followed by A positive.

Previous studies had found that people with type A blood have a higher risk of contracting the virus.

The SARS-CoV-2 coronavirus has a higher affinity for other cells, such as those found in the respiratory tract, that express a specific type A molecule called an antigen.

The SARS-CoV-2 coronavirus has a higher affinity for other cells, such as those found in the respiratory tract, that express a specific type A molecule called an antigen.

One trial finds that convalescent plasma therapy does NOT reduce the risk of Covid-19

Injection of coronavirus patients with the blood of survivors does not increase their chances of improvement, according to a major study.

Scientists conducting the REMAP-CAP trial have stopped registering ICU-infected patients after finding “no evidence” that convalescent plasma therapy increased survival rates.

Therapy has also been abandoned by the RECOVERY trial, a world leader.

The first focuses on patients with serious illnesses, while the second includes people hospitalized but not with serious illnesses.

The findings of the study’s trials appear to be a dead end for the promising treatment the NHS, NIH and academics were promoting.

One study suggested that type A people have more receptors to which the virus can bind, making them more susceptible.

But Dr. Jeffrey Anderson of the Intermountain Medical Center Heart Institute in Salt Lake City performed the most complete and controlled analysis to date.

“With contrasting reports from China, Europe, Boston, New York and elsewhere, we initiated a comprehensive and prospective case-control study that included more than 11,000 people who were recently infected with SARS-CoV-2, and not we found no ABO associations with susceptibility or severity of the disease, ”the study’s authors write in their article, published today in JAMA Network Open.

“Given the broad and prospective nature of our study and its strongly null results, we believe that significant SARS-CoV-2 and Covid-19 associations with ABO groups are unlikely,” they add.

Researchers cannot explain why previous studies came to different conclusions, but they cite several factors that may have led to previous results.

They say that pure chance, publication bias, genetic differences, geography, and variants may have led to biased data indicating that some blood groups are at higher risk.

However, the study found that while the blood type does not, other factors increase the risk of Covid-19.

These include being a man, being older and also people who did not belong to the white ethnic group.

“Among individuals with Covid-19, hospitalization was associated with gender and male age,” the researchers write. “Admission to an ICU was also associated with male age and gender.”

The data also found that non-white people, including African Americans; American or Alaska Native Indians; Native Hawaiians or Pacific Islanders; Asians; and people who did not reveal their ethnicity are more likely to test positive.

However, there was no link between these people and the severity of the disease.

Previous evidence of how blood type affects Covid

On March 17, 2020, just as the virus was being exploited in the UK and before the first blockade was introduced, MailOnline reported that Chinese researchers found that people with type A blood are much more likely to to catch coronaviruses than those of type O.

The study in Wuhan also found that people with type A blood are more likely to die from COVID-19.

In the general population, type O blood (34%) is more common than A (32%).

However, among patients with COVID-19, people with type O accounted for only 25%, whereas type A accounted for 41%.

People with type O blood accounted for a quarter (25%) of deaths in the investigation. Typically, type O people represent 32% of the people in Wuhan.

Researchers in China evaluated 2,173 people who had been diagnosed with coronavirus, including 206 people who died after contracting the virus, from three hospitals in Hubei.

Scholars compared data from infected patients in Wuhan with 3,694 uninfected people in the same region.

Of the 206 patients in the study who died, 85 had type A blood, the equivalent of 41% of all deaths.

In the healthy population of Wuhan, a city of 11 million people, 34% of people are type A.

In the study cohort, 52 of the people who died were type O, accounting for a quarter of all deaths. Under normal conditions, only 32% of people are type O.

The figures for all infections, not just deaths, are 26% and 38% type O and type A, respectively.

In November 2020, MailOnline again reported a similar study that found people with type A blood are at higher risk.

Researchers at the Toronto Institute of Clinical Assessment Science studied 225,556 people who were tested for blood between 2007 and 2019 and a Covid swab in 2020.

One study found that people with type O blood are 12% less likely to catch coronavirus than other blood types.

He also revealed that people with a negative blood group (O-, A-, B-, or AB-) are, on average, 21% less likely to get the virus than people with a positive type.

People with type O or negative blood are also 13% and 19% less likely to develop severe symptoms or die, respectively.

In the UK, around 15% of the population has a negative blood type and almost half (around 48%) is type O.

Approximately one in eight people (13%) are O-, who are 26% less likely to become infected and 28% less likely to have severe symptoms or die.

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