Respiratory tract infections are a common ailment that affects individuals of all ages across the world. This type of infection can be caused by viruses, bacteria, or even fungi, and may result in a variety of symptoms such as coughing, fever, and difficulty breathing. Some synonymous terms that describe this condition include upper respiratory tract infection (URTI), lower respiratory tract infection (LRTI), chest infection, bronchitis, and pneumonia. These conditions affect specific areas within the respiratory system, such as the lungs, bronchi, and trachea. Understanding the different types of respiratory tract infections and their symptoms is essential to proper diagnosis and treatment, which can often be managed through rest, hydration, and medication.