pharmaceutical · input

Diagnostic-Grade Monoclonal Antibodies (mAbs)

High-affinity monoclonal antibodies raised against diagnostic target antigens (SARS-CoV-2 nucleocapsid, troponin I, hCG). Used in both lateral flow and immunoassay analyzer platforms. Chinese CROs (Sino Biological, Fapon Biotech) have become major global raw material suppliers for diagnostic mAbs, often invisible to end users and regulators.

Source countries

Companies

Goods affected

Claims on record

What depends on it

Goods that need this input

1 essential American goods rely on diagnostic-grade monoclonal antibodies (mabs) somewhere upstream in their supply chain.

Health

Diagnostic tests and lab supplies

PCR reagents, rapid antigen tests, lab analyzers, and sample collection kits for clinical and public health testing.

Where it comes from

Source countries

Share of global supply, by country.

Country	Share of supply
CNChina	40%
USUnited States	30%
DEGermany	15%

Who makes it

Supplier companies

4 companies produce diagnostic-grade monoclonal antibodies (mabs).

HyTest Ltd.

HQ FI18% shareSOLE SUPPLIER

Finnish biotechnology company (Turku, Finland); specialist manufacturer of diagnostic monoclonal antibodies for cardiac biomarkers; introduced the first anti-cardiac troponin I (cTnI) monoclonal antibodies to market in 1994; supplier to virtually every major cardiac diagnostic test maker (Abbott, Roche, Siemens Healthineers, Beckman Coulter); acquired by Mindray Medical (China's largest medical device company) in 2016 for an undisclosed sum; Mindray ownership means Chinese corporate control of the dominant non-Chinese supplier of troponin I capture antibodies — the gold standard biomarker for myocardial infarction diagnosis

Sino Biological Inc.

HQ CN15% share

Chinese biotechnology CRO/manufacturer (Beijing); specializes in recombinant protein production and monoclonal antibody development for diagnostic use; one of the world's largest suppliers of diagnostic-grade SARS-CoV-2 antibodies (spike, RBD, nucleocapsid); supplied capture and detection antibodies for COVID-19 rapid antigen tests manufactured by Western companies in 2020-2021; rapid protein and antibody development capability (weeks vs months for Western competitors) made Sino Biological the fastest-to-market supplier for novel pathogen antibodies; exports to 100+ countries

Medix Biochemica Group

HQ FI12% share

Finnish diagnostic reagent company (Kauniainen, near Helsinki, Finland); produces monoclonal and polyclonal antibodies for cardiac markers (troponin, CK-MB, myoglobin), fertility hormones (hCG, LH, FSH), infectious disease (HIV, HCV), and other IVD applications; key OEM supplier to global diagnostic companies; alongside HyTest, one of the two Finnish firms that supply the antibody backbone for most of the world's cardiac rapid tests; exports to 100+ countries

Meridian Bioscience Inc. (Diagnostics Division)

HQ US10% share

Meridian Bioscience (Cincinnati, Ohio; NASDAQ: VIVO); produces diagnostic-grade monoclonal antibodies and polyclonal antibodies for infectious disease, GI markers, and respiratory testing; sells antibodies to OEM diagnostic test manufacturers as raw components; key hidden supplier behind many branded rapid test kits; also produces PCR enzymes (Taq, RT) making it a multi-layer diagnostic supply chokepoint

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