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An upper respiratory tract infection (URTI) is an illness caused by an acute infection, which involves the upper respiratory tract, including the nose, sinuses, pharynx, larynx or trachea. [ 3 ] [ 4 ] This commonly includes nasal obstruction, sore throat, tonsillitis , pharyngitis , laryngitis , sinusitis , otitis media , and the common cold .
Influenza-like illness is a nonspecific respiratory illness characterized by fever, fatigue, cough, and other symptoms that stop within a few days. Most cases of ILI are caused not by influenza but by other viruses (e.g., rhinoviruses, coronaviruses, human respiratory syncytial virus, adenoviruses, and human parainfluenza viruses).
Typical infections of the upper respiratory tract include tonsillitis, pharyngitis, laryngitis, sinusitis, otitis media, certain influenza types, and the common cold. [3] Symptoms of URIs can include cough , sore throat , runny nose , nasal congestion , headache , low-grade fever , facial pressure, and sneezing .
The flu usually leads to a dry cough, and a cold tends to cause a slight cough. However, you can have any of the four conditions without cough. How do RSV, COVID, cold, and flu symptoms differ?
The reason why COVID causes a sore throat is because it’s an upper respiratory viral infection. This means it affects the upper airways, causing them to become irritated, which can then lead to ...
Viral Infections. Infections can cause chills with or without a fever. A virus can act directly on your nervous system and indirectly influence it through protein molecules that tell neural cells ...
Other symptoms may include a runny nose, cough, headache, difficulty swallowing, swollen lymph nodes, and a hoarse voice. [1] [6] Symptoms usually last 3–5 days, but can be longer depending on cause. [2] [3] Complications can include sinusitis and acute otitis media. [2] Pharyngitis is a type of upper respiratory tract infection. [7]
Laryngitis is categorized as acute if it lasts less than 3 weeks and chronic if symptoms last more than 3 weeks. [1] Acute cases usually occur as part of a viral upper respiratory tract infection, [1] other infections, and trauma such as from coughing or other causes. [1]