Continuously updated · last reviewed Sep 5, 2026
Each page covers one condition properly: what it actually is and what it feels like, what causes it, how common it really is and in whom, and how it's diagnosed — followed by the specific variants with a replicated link to it, and, where the research supports it, how genetics can change the way a medicine behaves.
Written in two registers so one page serves both readers: plain language first, then a clinical detail section with the precise terminology, effect sizes and diagnostic thresholds. Every claim is sourced from freely-available published research and cited on the page, so you can check us — or hand the page to your doctor. 27 conditions so far, growing continuously, and free to reuse with attribution (CC BY 4.0).
3 results in Hematologic
The ABO gene variant that creates blood type O by disabling its enzyme, why blood type matters for transfusion, and which disease links (clotting risk, malaria, cholera) are strong versus which (COVID-19, cancer risk) remain modest or contested.
Read more → HematologicA promoter variant that silences the Duffy antigen on red cells, protecting against Plasmodium vivax malaria and causing a normal, lower neutrophil count that is routinely and wrongly treated as disease in people of African ancestry.
Read more → HematologicA common inherited change in the F5 gene that makes blood slightly slower to switch off clotting, raising the risk of deep vein thrombosis and pulmonary embolism. Most carriers never have a clot.
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