Rare Diseases R&D

We’re deeply committed to discovering, developing, and delivering new options for people living with rare diseases.
Artist’s interpretation of a therapeutic merging with a lysosome
Artist’s interpretation of a therapeutic merging with a lysosome
We’re leading the way to discovery in a very connected ecosystem of academic, foundation, and industry research that’s dedicated to bringing new options for people with rare diseases.
Pablo Sardi

Pablo Sardi

Sanofi’s Global Head of Rare and Neurological Diseases

Layla Bral, Associate Scientist - LMR Ghent – Nanobody Research Platform Discovery, Belgium
Layla Bral, Associate Scientist - LMR Ghent – Nanobody Research Platform Discovery, Belgium

Our Rare Disease Pipeline

Around 400 million people globally are affected by 7,000 diseases so rare they are difficult to diagnose and treat.1 We’ve been uncompromising in our commitment to improving their lives. By developing the first-ever medicines for five rare diseases, we’ve learned what it takes to turn the impossible into possible. We’re more motivated than ever to deliver treatments that set the standard for care in rare diseases.

Follow the Science

Accelerating Genomic Medicine

New gene editing, synthetic biology, and nanobody technologies are reinventing the landscape of medicine

How Science Gets Done

New technologies are changing what’s possible in drug design and development

Pioneering R&D

We delivered the first successful enzyme replacement therapy for Gaucher disease, a lysosomal storage disorder (LSD), in 1991.2 Treatments for Fabry, Pompe, Mucopolysaccharidosis I and Acid Sphingomyelinase Deficiency followed.

Now, we’re addressing multiple LSDs, exploring a biological pathway shared by many of these disorders.

Advancing Science With the Rare Disease Community


Building on our strong foundation in rare, genetic conditions caused by enzyme deficiencies,3 we’re exploring new treatments for people with GM2 gangliosidoses and other disorders.

Small Population, Big Impact

We steward multinational registries that unite patient communities and help doctors share rare clinical and real-world information.4 Our scientists also use them to research new therapies.

New Approaches

Bolstered by strategic acquisitions and a genomic medicine unit, we’re accelerating drug discovery to improve the lives of families affected by rare diseases.

More About Rare Diseases

Rare Disease Advocacy

Rare Disease Registries

New Frontiers in Genomic Medicine


  1. Haendel M, Vasilevsky N, Unni D, et al. (2020) How many rare diseases are there? Nat Rev Drug Discov 19:77-78. doi: 10.1038/d41573-019-00180-y
  2. Hindo C, Pastores GM, Brady RO (2018) Rare Disease Database: Gaucher Disease. National Organization for Rare Disorders (NORD) website. Accessed 27 October 2022. See also Sun A, Chang IJ, Lam C, Berry GT (2021) Lysosomal Storage Disorders. In: Pyeritz RE, et al., Eds. Emery and Rimoin's Principles and Practice of Medical Genetics and Genomics (Seventh Edition). Academic Press, 563-682 pp; DOI: 10.1016/B978-0-12-812535-9.00014-5.
  3. Futerman AH, van Meer G (2004) The cell biology of lysosomal storage disorders. Nature Rev Mol Cell Biol 5:554-565; DOI: 10.1038/nrm1423
  4. Kölker S, Gleich F, Mütze U, Opladen T (2022) Rare Disease Registries Are Key to Evidence-Based Personalized Medicine: Highlighting the European Experience. Front Endocrinol 13:832063; DOI: 10.3389/fendo.2022.832063

Page updated November 2023

MAT-GLB-2004284 v3.0 11/2023