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.
RED BLOOD CELLS. 1  Group O+ can donate red blood cells to any recipients except O-. 2  Group O-is the universal donor, but a person with O-blood type can only receive this type. 3  Group A+ can donate red blood cells to A+ and AB+ recipients.