Genetics of Immune Function
Immune function encompasses the full range of immune system activities — from pathogen detection and elimination to immune memory and tolerance. Genetic variants across innate and adaptive immune pathways influence overall immunocompetence and disease susceptibility.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is Immune Function?
The immune system is a complex network of cells, proteins, and signalling molecules that defend the body against pathogens while maintaining tolerance to self-tissue. Genetic variants across this system — from innate sensors to adaptive lymphocytes — collectively shape an individual's immune phenotype. Strong immune function is associated with effective pathogen clearance, vaccine responsiveness, and cancer immunosurveillance. Impaired immune function may lead to recurrent infections, chronic viral persistence, or inadequate resolution of post-infectious states such as Long COVID.
Biological pathways commonly discussed in relation to Immune Function
Research into Immune System Function and Immunocompetence has highlighted several biological pathways that may be relevant. Genetic variants within these pathways may influence individual susceptibility, symptom severity, or the trajectory of the condition.
Innate Sensing
Pattern recognition receptors detect pathogens and initiate immediate responses. Genetic variants in TLRs, NLRs, and cGAS-STING influence the speed and intensity of innate immune activation.
Adaptive Immunity
T and B lymphocytes provide antigen-specific immunity and long-term memory. HLA gene variants, TCR signalling genes, and B-cell receptor pathway variants influence adaptive immune efficacy.
Immune Memory
After infection or vaccination, memory T and B cells enable rapid responses to re-exposure. Variants in genes governing memory cell formation and maintenance may influence vaccine responsiveness and long-term protection.
Cytokine Coordination
Cytokines coordinate communication between immune cells. Variants in cytokine genes and their receptors influence the balance between pro- and anti-inflammatory immune activity.
Key genes studied in relation to Immune Function
The following genes have been studied in relation to Immune System Function and Immunocompetence. These genes span the biological pathways most commonly discussed in this area of research.
28 genes total studied in relation to Immune Function across the ChronicDNA dataset.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to Immune Function. Each variant represents a position in the genome where individuals may carry different alleles.
57 variants total across genes studied in relation to Immune Function.
How personal DNA data may provide educational insights
Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may relate to areas such as Immune Function.
This is not a diagnostic service. Genetic variants do not determine whether you have Immune Function, nor do they predict your clinical outcomes. The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. All results should be discussed with a qualified healthcare provider.
Related conditions and pathways
Immune Function shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
What determines immune function genetically?
Hundreds of genetic variants across innate immune sensors, HLA genes, cytokine pathways, T-cell and B-cell signalling, and regulatory mechanisms collectively shape immune function. No single gene determines overall immunocompetence.
How may immune function genetics relate to Long COVID?
Impaired viral clearance during acute infection — potentially influenced by antiviral immune gene variants — may contribute to viral persistence and the chronic immune activation seen in Long COVID.
Which immune function genes are most studied?
Widely studied genes include HLA-A/B/C/DRB1, TLR7, IL6, TNF, IL10, IFNG, PTPN22, and STAT genes. These reflect the breadth of immune pathways studied in infection, autoimmunity, and chronic illness research.
Can consumer DNA data reveal immune function variants?
Consumer DNA datasets include many immune-relevant variants. ChronicDNA analyses these to provide educational insights into individual immune pathway biology — not to diagnose immune deficiency or predict infection outcomes.
Explore DNA insights
If you already have DNA data from 23andMe, AncestryDNA, or MyHeritage, upload your raw file to ChronicDNA and receive a personalised educational report covering genes studied in relation to Immune Function and connected biological pathways.
Get Your Personalised DNA ReportInformational and educational only · Not a diagnostic tool · GDPR compliant
28 genes · 57 variants analysed in relation to Immune Function