Muscle weakness is a symptom of a wide variety of mild to serious diseases, disorders and conditions. Muscle weakness can result from infection, trauma, malignancy, autoimmune diseases, and other abnormal processes.
Difference between O+ and O- Blood Group. Key difference: The blood groups O+ and O- are universal donors. The only difference is in the recipients to whom the blood is transfused; O+ can be transfused to any positive blood groups, whereas O- is transfused to both positive as well as negative blood groups. O+ blood group is a common blood group among most of the people.
O-blood can donate to anyone, but can only get blood from other O-'s. If a type A donates to a type O, the antibodies from A collide with the anti-A antibodies from O, and can cause death to the person, or brain damage to a baby that's about to be born.