Mr. L, a 36-year-old male technician, presented with fever, cough, sore throat, rhinorrhea, headache, and muscle/joint pain. He was diagnosed with upper respiratory tract infection and acute bronchitis by Dr. I. Examination found sunken eyes, dry lips, temperature of 38.5°C, and cough producing whitish sputum. Laboratory tests detected Influenza B antigen. Treatment included medications for fever reduction, anti-inflammatories, antibiotics, antivirals, and cough remedies. Nursing care centered around temperature monitoring and reduction, respiratory support, comfort measures, and addressing nutritional deficits.