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WS/T 645.1-2026Reference intervals for common clinical immunological tests - Part 1: Serum immunoglobulin G, immunoglobulin A, immunoglobulin M, complement 3, complement 4 (English PDF)

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Issued by

National Health Commission

Level / Type

National · Recommended

Issue date

May 25, 2026

Implementation date

November 1, 2026

Scope

WS/T 645.1-2026 (Reference intervals for common clinical immunological tests - Part 1: Serum immunoglobulin G, immunoglobulin A, immunoglobulin M, complement 3, complement 4) is available as an English-translated PDF.

WS/T 645.1-2026 — This standard specifies the reference intervals and their application for serum immunoglobulin G, immunoglobulin A, immunoglobulin M, complement 3, and complement 4 in Chinese adults aged 18 to 79.

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Document preview — WS/T 645.1-2026

National Standard of the People's Republic of China

ICS: 11.100
Classification: C 50
Replacing: WS/T 645.1-2018

Issued by: National Health Commission

What this standard covers1
Document data2

What this standard covers

This standard specifies the reference intervals and their application for serum immunoglobulin G, immunoglobulin A, immunoglobulin M, complement 3, and complement 4 in Chinese adults aged 18 to 79. It applies to the reporting and interpretation of test results for serum immunoglobulin G (IgG), immunoglobulin A (IgA), immunoglobulin M (IgM), complement 3 (C3), and complement 4 (C4) by clinical laboratories in medical institutions; manufacturers of relevant in vitro diagnostic products may also use it as a reference.

Document data

International classification (ICS): 11.100.

Chinese classification (CCS): C50.

Estimated length of the Chinese original: 8,849 words.

Supersedes the earlier edition WS/T 645.1-2018.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 6 pages — is available in the English PDF.

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