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22 October, 00:39

Rheumatoid arthritis is an autoimmune disease which causes the joints in the body to be constantly inflammed. This disease results when body tissues are

A.

attacked by one's own immune system.

B.

infected by a virus.

C.

infected by bacteria.

D.

attacked by oxygenated red blood cells.

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Answers (1)
  1. 22 October, 04:09
    0
    Attacked by ones own immune system
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