Respiratory infections are infections that affect the respiratory system, including the lungs, bronchial tubes, throat, and sinuses. These infections can be caused by a variety of pathogens such as viruses, bacteria, and fungi. Common respiratory infections include the common cold, influenza, pneumonia, bronchitis, and tuberculosis. Symptoms of respiratory infections can vary but often include coughing, sneezing, sore throat, fever, and difficulty breathing. Treatment for respiratory infections may include antiviral or antibiotic medications, rest, fluids, and over-the-counter remedies to alleviate symptoms. Prevention strategies include good hygiene practices, vaccination, and avoiding exposure to infected individuals. Research in this area focuses on understanding the causes, prevention, treatment, and management of respiratory infections to improve outcomes for patients.