What a Positive ANA Really Means

Why many healthy people test positive and which follow-up tests actually help.

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How it works · Autoimmunity

The immune system protects you

B cells make antibodies, Y-shaped proteins that tag germs so the rest of the immune system can clear them.

At a glance

Topic

Tests

Length

5 min

Reviewed by Farhan Tahir, MD, FACR

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