RH disease

Patient discussion about RH disease

Q. Explain RH please A. Rh...? as the blood type Rh? or you meant to ask about RA which is Rheumatoid Arthritis.
if you seek information about the blood type, here is something that will help you understand:
http://www.nlm.nih.gov/medlineplus/ency/article/003345.htm
if RA is what you are looking for, here is a great tutorial that will do it nicely:
http://www.nlm.nih.gov/medlineplus/tutorials/rheumatoidarthritis/htm/lesson.htm