"The cold-causing coronaviruses, as well as many other viruses that cause common colds, are typically restricted to the upper respiratory tract, that is, the nose and sinuses. Both SARS-CoV and SARS-CoV-2, however, are capable of invading deep into the lungs, something that is associated with more severe disease.  

One possible reason for this is that the virus binds to the ACE-2 receptor on human cells in order to gain entry. This receptor is present in ciliated epithelial cells in the upper and lower airway, as well as in type II pneumocytes, which reside in the alveoli in the lower airway and produce lung-lubricating proteins."
[https://www.the-scientist.com/news-opinion/why-some-covid-19-cases-are-worse-than-others-67160]

((Sensory - Nasal Mucosa / Ectodermal|Nasal mucosa )) - emotional trigger: smell, recognition, judgement 
((Sensory - Nasal - Parasinus Mucosa|Sinus mucosa)) - emotional trigger: smell, recognition, judgement 
((Respiratory - Bronchial Mucosa and Muscle|Bronchial mucosa)) - emotional trigger: territorial fear, competition, scare, speechlessness
((Respiratory - Lungs - Alveoli|Lung alveoli)) - emotional trigger: deep fright, fear of dying