By Yelena Mandenberg & Yelena Mandenberg A fit and healthy dad-of-three, 27, tragically died from the flu after doctors noticed his first deadly symptom – severe difficulty breathing. Quenten Thomas, a young father from Marysville, Tennessee, suddenly fell ill and was rushed to the hospital multiple times due to shortness of breath, according to Mirror US. His father, Robert Thomas, said: “It hurt really bad when he coughed, and he was having trouble catching (his) breath,” before medical help was needed. Despite having no prior conditions, Quenten’s health rapidly deteriorated. Robert continu…