According to some studies, people with particular blood types may have a slightly higher or lower risk of developing particular health conditions.
Heart Disease
Several studies suggest that those with blood type O may have a lower chance of getting heart disease than those with blood type A, B, or AB.
Cancer
People with blood group A may be slightly more likely to develop stomach cancer. While blood type B may be at risk of developing pancreatic cancer.
Blood Clots
Several studies suggest that those with blood type AB may be more susceptible to blood clots.
Alzheimer's Disease
People with blood type AB may be slightly more likely than people with other blood types to develop Alzheimer's disease.
Malaria
People with blood type O may be less prone to malaria than those with other blood types.
Conclusion
There is not much scientific proof that various blood types are more susceptible to certain diseases. However, some studies have linked diseases to certain blood groups.