text: my husband has mvp,mr, . can type o blood cause this condition to be worse because of blood infection.? his dad and sister both died at age 60 with this heart condition. they both had type o blood like my husband. like them he has bleeding ulcers. we have learned type o blood causes this condition to be more likley. could this be the same with mvp,mr causing them to be more susceptible to the bacteria which cause infections in the blood. i am not sure where you have gotten your information from but please disregard it.  for starters.... your blood type is inherited from your parents... as are the potential for many other conditions.. like heart disease... diabetes... and others.  type o blood is the most common in the world therefore your statistics for type o blood people having this condition more, can be said that... since most of the population has type o blood it is reasonable to assume that more people who have heart disease will also have type o blood. you would be quite wrong to say that a specific type of blood causes diseases.  infections in the blood occur when the infection gets in and overpowers the body's immune system. your blood plays an important role in your immune system by transporting the white blood cells around the body to fight the infection. if you are low on white blood cells then the infection can take over. if your white cells are ineffective against the infection, then the infection can take over.  but, the type of blood that you have, has no relationship to diseases, or potential problems.