A baby born without an immune system is recovering after undergoing pioneering surgery to save his life. Ellis Melhuish spent the first four months of his life in a hospital after doctors discovered he was born with a rare immune system disorder, which means even a common cold could kill him. His parents Savannah, 26, and James, 28, based in Staffordshire, England, were warned at the time of the 20-week scan that their son may be born with a complex heart defect but were reassured that, following a life-saving surgery, he would be fine. However, just weeks after Ellis was born in February this year, he was diagnosed with severe combined immunodeficiency (SCID) and CHARGE syndrome. Infants born with SCID have defects in their immune cells. As a result, these children have problems fighting infections and usually die within the first two years of life. The rare CHARGE syndrome affects around …