Coronavirus disease (COVID-19) is a new strain that was discovered in 2019 and has not been previously identified in humans. However, the origin of this virus is china and now it has been all over the world.
Somehow china successfully stopped it in Wuhan. They do not expose the method yet "How they did it". Most of the European countries are badly affected and suffering from the virus.
Here you can share your thoughts
CHINA VS EUROPE - Why china is not exposed to their methods to the other countries to stop the spread.