Five-year-old Grace Tan was born with Pyruvate Dehydrogenase Complex Deficiency (PDCD), an extremely rare condition that delays mental and physical growth. There are only three diagnosed PDCD cases in Singapore and about 500 cases worldwide.

World Rare Disease Day falls on the last day of February. It is an annual observance to raise awareness of rare diseases and improve access to treatments.

Click here to see how Grace and her family are coping with bringing her up in a video on Through The Lens.