National Cancer Institute (source definition)
Hemagglutination Inhibition Assay
An in vitro assay that is used to determine whether antibodies present in serum samples will prevent hemagglutination in a cell culture plate containing red blood cells and influenza virus.
Review and references
Automated source check (NCI definition)
2026-10-19
2026-10-19
professional use
What it is
An in vitro assay that is used to determine whether antibodies present in serum samples will prevent hemagglutination in a cell culture plate containing red blood cells and influenza virus.
Source: National Cancer Institute, NCI Thesaurus 26.09d, C120688. NCI definition, reproduced without modification under CC BY 4.0.
Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Compliance note
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.