Cassie Sutton was just five years old — full of life, starting school, and thriving. But what began as a simple sore throat quickly spiraled into a heartbreaking tragedy that could have been avoided.

Despite multiple doctor visits, Cassie was told she only had a cold and was sent home. The truth was far more dangerous, and a quick, simple test could have saved her life.

It all started like so many other childhood illnesses: a sore throat and hoarse voice. Continues…