Harmonization with the “First WHO International Standard for anti-SARS-CoV-2 immunoglobulin (human)” (NIBSC code: 20/136) enables the issuing of results in standardised binding antibody units (BAU)/mL according to WHO recommendations.
Please note, as per recent studies, the minimum level of binding antibodies that protect against COVID-19 infection is 54 BAU/ml.
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