Generally, a coronavirus is a kind of common virus that causes an infection in your nose, sinuses, or upper throat. It gets its name from its crown-like shape. Most coronaviruses are not dangerous and mostly simply cause discomforts like runny nose, fever, sore throat and coughing.
Viruses are classified by multiple measures, two of these measures inform the severity of damage if infected and how quickly the virus spreads from host to host (High severity with high probability of infection makes a virus very deadly).
It is important to note the virus and as well as note the disease it causes.
Our world is currently suffering from one new type of coronavirus whose effect has been classified as a PANDEMIC by the WHO. This new virus has been named SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) and the disease it causes is named COVID-19.
SARS-CoV-2 has been noted to have a high infection rate (more contagious) and this metric called the R-naught (Ro) is yet to be computed. This high infection rate can be attributed to certain properties of the virus, that is, being able to spread in the incubation stage, and this makes the infection spread very difficult to control.
Infected persons without showing symptoms are still able to transmit the virus and it can take about five (5) or more days after infection before symptoms begin to show. Symptoms mostly begin with high temperature (fever) then to difficulty in breathing after about three to four days then shortly to the illness called ARDS (Acute Respiratory Distress Syndrome). ARDS is when fluids build up in the lungs and this is often fatal. Medical attention is very important with respect to recovery at this stage.
It is important noting that there is, at the time of this writing, no vaccine or anti-viral medication for SARS-CoV-2 and the disease COVID-19.
Source. https://pusagwocom.com/corona virus-part-1-the-virus-the-disease/