Which Blood Type Has The Weakest Immune System

Your parents passed on your blood type. Many combinations can be made; Just because your parents have the same blood type doesn’t mean you will be too. For example, parents with blood type O always pass on their blood type. However, parents with type B can have a child with type O or B. And parents with type A can have a child with type O or A. A combination of Type A and Type B can result in any type of blood

Most of the time, the purpose of blood typing is to know who you can safely donate or receive blood for. But your blood type can also put you at risk for certain medical conditions. Blood type and your health can be related:

Heart Attack And Heart Disease

It may seem obvious that your blood type is related to your heart since your heart pumps blood to the rest of your body. But your blood type can put you at higher risk for conditions like heart attack and heart disease. This is due to a gene called the ABO gene, a gene present in people with blood types A, B, or AB. The only blood type that doesn’t have this gene is blood type O. If you have the ABO gene and live in an area with high levels of air pollution, you may be times more likely to have a heart attack than those who don’t have the gen.

The ABO gene may also increase the risk of coronary artery disease (CAD). CHD develops when the arteries that supply blood to the heart and heart harden and narrow, which can lead to a heart attack if they are blocked.

What You Can Do If You’re At Risk

Just because you have the ABO gene doesn’t mean heart complications are inevitable. There are ways to avoid further increasing your risk:

  • Stay out of highly polluted areas and exercise indoors
  • Maintain a heart-healthy diet by eating fruits, vegetables, whole grains, fish, and nuts
  • Get regular exercise
  • Avoid smoking
  • Get regular physical exams to monitor your heart health, which keeps you and your doctor informed about any warning signs of heart problems

Brain Function And Memory Loss

The ABO gene is linked to brain function and memory loss. People with blood types A, B, and AB are up to 82% more likely to develop cognitive and memory problems. Which can lead to dementia, compared to people with blood type O.

One possible reason for this memory loss is the fact that blood type can cause things like high blood pressure, high cholesterol, and diabetes. These conditions can lead to cognitive decline and dementia. Blood type has also been linked to strokes. which can occur when blood flow to the brain is cut off.

What You Can Do If You’re At Risk

There are ways to keep your cognitive function strong:

  • Get regular exercise.
  • Avoid too much stress.
  • Try to get 7 to 9 hours of sleep each night.
  • See your physician regularly to catch early signs of dementia


There are many factors associated with an increased risk of cancer, and sometimes it can be difficult to know which to consider more seriously than others. However, it has been found that people with blood type A have an increased risk of stomach cancer compared to people with other blood types.

The ABO gene may also play a role in an increased risk of cancer. This gene has been linked to other cancers including lung, breast, colon, prostate, liver, and cervical cancer.


This correlation has been studied for more than 60 years, and research continues to show a correlation. And there is no definitive explanation as to why the ABO gene may increase the risk of some cancers. What to do if you’re at risk Although you may not be able to change your blood type, there are ways to reduce your risk of cancer.

Ways To Reduce the Risk Of Cancer

  • Eat a healthy diet of fruits, vegetables, whole grains, fish, and poultry
  • Exercise regularly
  • Avoid smoking
  • Although there are no surefire ways to prevent cancer. These measures can help reduce your risk and keep you healthy

What Does This Mean For Your Health?

Your blood type is just one of the factors that contribute to your risk for certain health conditions. While your blood type may put you at higher risk for certain medical conditions. Nothing is definitive. Being aware of how your blood type can affect your health is a good start. But it’s just as important to see your doctor for regular checkups and maintain a healthy lifestyle.


Recent studies show that people with blood type A may be more susceptible to COVID-19  than people with other blood types. Researchers in China came to this conclusion after studying 2,173 patients treated for COVID at three hospitals in Shenzhen and Wuhan – 19. The disease caused by the SARS-CoV-2 virus.

The researchers looked at the distribution of blood types in the populations of both cities and compared them to patients who had contracted the virus. The average Wuhan population had a blood group distribution of 34% type O, 31% type A, 24% type B, and 9% type AB. In comparison, those with the virus were distributed as follows: 38% type A, 26% type B, 25% type O, and 10% type AB.


Moreover, Statistics show that the highest percentage of people who contracted the virus had type A blood. Another study that included a review of the medical records of 7,770 people who tested positive for the SARS-CoV-2 virus found that those with:

Tested Positive For The SARS-CoV-2 Virus

  • Type A blood were less likely to use/need a ventilator
  • AB-type blood were more likely to use/need a ventilator
  • Type O blood had a lower risk of contracting the virus

Do these study results mean that those with blood type O have some innate immunity to COVID-19? Not necessarily. These investigations were only preliminary and haven’t been peer-reviewed.

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