A 20-year-old woman complains of fever of 38°C and productive cough with expectoration i sputum. According to the patient's medical history, the disease onset was acute and occurred 5 days ago after recovery from a case of an acute respiratory viral infection. Objectively, respiratory rate 26/min. Percussion produces a dull sound in the lower segments of the lungs on the right. Auscultation detects weakened respiration in this area, with wet fine vesicular crackles, Heart rate 110/min. What is the most likely diagnosis in this case?