"seroprotected" meaning in English

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          "text": "On day 21, a majority of subjects (66%) in the 30μg HA adjuvanted group (GMT = 34) were seroprotected.",
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        "simple past and past participle of seroprotect"
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          "ref": "2015 July 6, “Matrix M H5N1 Vaccine Induces Cross-H5 Clade Humoral Immune Responses in a Randomized Clinical Trial and Provides Protection from Highly Pathogenic Influenza Challenge in Ferrets”, in PLOS ONE, →DOI:",
          "text": "On day 21, a majority of subjects (66%) in the 30μg HA adjuvanted group (GMT = 34) were seroprotected.",
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  "word": "seroprotected"
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