A 5-month-old previously healthy male infant presents to the ED with cough and dyspnea for 2 days and a temperature of 102. He is tachypneic and has bilateral expiratory wheezing and subcostal retractions. His Sputum Histology is shown Below. Which of the following is the most common cause of his illness?
A. Strep Pneumoniae
B. H. Influenza
C. RSV
D. CMV
E. Corona Virus