IGA or IgA may refer to:

Businesses and organizations

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In government

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In science and technology

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  • Immunoglobulin A (IgA), an antibody playing a critical role in mucosal immunity
  • Intergranular attack, another term for intergranular corrosion (a form of corrosion where the boundaries of crystallites of the material are more susceptible to corrosion than their insides)

Other uses

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See also

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