Upper respiratory tract infection Reference Libraries
The common cold is a viral disease of the upper respiratory system, caused primarily by rhinoviruses and coronaviruses. Symptoms usually include a cough, sore throat, runny nose, and a fever. There is no known treatment to shorten the duration of the virus yet the cold normally dissipates after 7 to 10 days. It is the most common infectious disease in humans who on average are infected two to...
- Boughs or branches.
- Warbling of birds in trees.