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An estimated 3.5%-5.9% of the global population live with rare diseases, and approximately 80% of these diseases have a genetic cause. Rare genetic diseases are difficult to diagnose, with some affected individuals experiencing diagnostic delays of 5-30 years. Next-generation sequencing has improved clinical diagnostic rates to 33%-48%. In a majority of cases, novel variants potentially causing the disease are discovered.
Children living with a rare disease often endure a lengthy journey to diagnosis, commonly referred to as a diagnostic odyssey. This journey significantly impacts their physical, mental and financial wellbeing, in addition to that of their families. The diagnostic odyssey is often characterised by anxiety and stress surrounding the uncertainty of the future. This is experienced by the patient as well as by the family.