It started in China and spread to most countries of the world
Corona disease (or Covid-19) is an infectious disease caused by the newly discovered Coronavirus.
There was no knowledge of this virus and this disease before it appeared in the Chinese city of Johan in December 2019.

Corona virus takes an average of five days to show its symptoms:
Begin with a fever, followed by a dry cough, and after about a week, you will feel short of breath. Symptoms rarely appear as sneezing or runny nose.
- It does not mean that the symptoms appear when you have the disease, because they are similar to the common cold and influenza.
In severe cases it can cause: pneumonia, severe acute respiratory syndrome, insufficiency of functions of a number of body parts and even death.

Corona is transmitted by direct and indirect transmission.
- Direct transmission: through flying mist in coughing or sneezing and contact with infected people.
Indirect transmission: by touching contaminated surfaces and tools.

Corona virus prevention methods are:
Maintaining good hand and nail washing.
Use soap and hand sanitizer that contains alcohol.
Avoid touching the eyes, nose and mouth as much as possible.
Wearing masks to protect you from respiratory disease may provide some protection.
Avoid contact with sick people.
Cover your mouth when coughing or sneezing.
Cleaning and disinfecting things and surfaces.
Strengthening the immune system by: exercising, eating vegetables and fruits, drinking plenty of water.