Can you judge health from a person's blood type?

As early as the mid-1950s, it was found that blood type (red blood cell blood type) was closely related to diseases? After decades of clinical observation and repeated research, some experts in the medical field put forward the viewpoint of blood group prevention?

Blood type, as a genetic factor, plays a certain role in the occurrence of some diseases, but it is not decisive? It can only remind us that people with different blood types in ourselves and our families should always be on guard against the occurrence of those diseases in case of delay?