If a person had an infection of the respiratory system, they would most likely have a cough.
If you have an infection in the respiratory system then this can cause your airways to become restricted so that you cannot breath.
it is an infection of the upper respiratory system.
It would depend on where in the respiratory system the infection was, but coughing, especially a productive cough, is a major hallmark of lower respiratory infections. Chest pain is possible, but not guaranteed; same with fever. For an upper respiratory infection, I would expect a runny nose or nasal/sinus congestion.
It may if there is an infection in it or if you are allergic to it.
Colds make the upper respiratory system less resistant to bacterial infection. Secondary bacterial infection may lead to middle ear infection, bronchitis, pneumonia, sinus infection, or strep throat.
Acute= severe. Lower Respiratory Tract= Respiratory system below the larynx. This refers to a pneumonia or a bronchitis.
Tuberculosis(TB)
streptococus pneumonia
A person with a lowered immune system or taking long-term antibiotics is more likely to get an infection. All people who encounter large amounts of dirt are likely to get infected.
antibodies
To fight off infection or prevent sickness.
you (most likely) die