Do you know that coronaviruses are respiratory viruses which replicate in the airways, respiratory tract, breathing passages?

Coronaviruses discovered in the middle of 1960s could cause very mild symptoms such as a common cold, sometimes severe symptoms.  However, the newly-discovered type which causes Coronavirus Disease 2019 (COVID-19) could lead to severe symptoms such as difficult breathing. It is therefore imperative to know that individuals with underlying respiratory diseases may fight it hard to fight againt this virus if they are exposed to it.