Allergies occur when the body's immune system overreacts to outdoor stimulants such as mold spores and pollen. Learn about symptoms and treatment.
A respiratory infection that mainly affects children and causes a barking cough, hoarseness, and breathing difficulties.
Coronavirus is a term describes a family of viruses, common in both animals and humans.
Bronchitis is a condition in which the airways in the lower respiratory system become inflamed. Symptoms include coughing, mucus production, chest pain, fatigue, a low fever, and shortness of breath.