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Reportable infectious diseases are those that spread easily and can put others in a community at risk for becoming infected. These

Residual volume is the amount of air that remains in a person's lungs after fully exhaling. Doctors use tests to measure a person

Respiratory distress syndrome (RDS) of infants, sometimes called hyaline membrane disease, is a serious condition that most

Respiratory syncytial virus infection (RSV) is a common childhood infection that anyone can get. It can cause a runny nose

Referred pain occurs when a problem in one place in the body causes pain that travels down a nerve and is felt in another place

Rheumatoid factor (RF) is a protein (antibody) made by the immune system that can attack the body's own tissues. An elevated

Retinal detachment means that the retina—a thin layer of nerve tissue at the back of your eye—has detached, or pulled away. This

Retinopathy of prematurity (ROP) is a problem affecting the eyes of premature babies, especially those born at or before 30 weeks'

Reye syndrome is a very rare but serious disease that is most likely to occur in children younger than 15 years of age. The exact

The surface of red blood cells contains markers that the immune system can recognize—one of these markers is the Rh factor (Rh [D]