CFH (Complement Factor H): CFH is a gene that plays a crucial role in regulating the complement pathway, a vital component of the body’s innate immune system. The complement system offers rapid defence against microbial infections. CFH produces a protein that controls complement activity, helping to prevent damage to the body’s own cells. Mutations in the CFH gene are linked to diseases such as age-related macular degeneration (AMD), atypical haemolytic–uraemic syndrome (aHUS), and certain kidney disorders. Studying CFH is essential for understanding these conditions and developing targeted therapies.