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IgG

Immunology.
  1. immunoglobulin G: a class of circulating antibodies predominant in serum, produced by plasma cells and memory cells in response to pathogens and other foreign substances, able to pass through the placental wall to the fetal circulation to impart immune defense for the period of infancy.


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Word History and Origins

Origin of IgG1

First recorded in 1960–65
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Example Sentences

The antibodies they collected from people soon after their recovery included IgG antibodies, which circulate in the blood and generally decline in number after about a month since they are designed to quickly respond to new viruses.

From Time

“Given the volume of IgG antibodies delivered in our therapy, and the timing of these tests, it is likely that the second test is detecting REGN-COV2 antibodies,” said Hala Mirza, a spokeswoman for Regeneron.

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