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2. Upper respiratory tract infection - Wikipedia

   en.wikipedia.org/wiki/Upper_respiratory_tract...

   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.

3. Common cold - Wikipedia

   en.wikipedia.org/wiki/Common_cold

   The common cold or the cold is a viral infectious disease of the upper respiratory tract that primarily affects the respiratory mucosa of the nose, throat, sinuses, and larynx. [6] [8] Signs and symptoms may appear in as little as two days after exposure to the virus. [6] These may include coughing, sore throat, runny nose, sneezing, headache ...

4. Tracheitis - Wikipedia

   en.wikipedia.org/wiki/Tracheitis

   One of the most common causes is Staphylococcus aureus and often follows a recent viral upper respiratory infection. Bacterial tracheitis is a rare complication of influenza infection. [ 4 ] It is the most serious in young children, possibly because of the relatively small size of the trachea that gets easily blocked by swelling.

5. We're in flu season. What are symptoms? How to tell it's not ...

   www.aol.com/were-flu-season-symptoms-tell...

   RSV, or respiratory syncytial virus, usually causes mild symptoms akin to cold that go away on their own. But for babies, some young children and older adults, it can be serious.

6. How Worried Should We Be About the HMPV Virus? - AOL

   www.aol.com/lifestyle/worried-hmpv-virus...

   "Like other respiratory viruses, it causes upper respiratory infections. Most cases are mild, but infants, adults older than age 65, and those who are immunocompromised may have more serious ...

7. These Are the 2 Most Common COVID Symptoms Doctors Are ... - AOL

   www.aol.com/2-most-common-covid-symptoms...

   This is because anything that irritates the inside of the nose can cause a runny nose—including upper respiratory viral infections. When the lining of the nose becomes inflamed , it causes an ...