“Spinal muscular atrophy (SMA) is a genetic condition that causes worsening muscle weakness. There are five subtypes, which range in severity and age of onset. There’s no cure for SMA, but certain therapies and medications can help manage symptoms.”

Cleveland Clinic (Cleveland Clinic (https://my.clevelandclinic.org/health/diseases/14505-spinal-muscular-atrophy-sma)