In December 2019, the coronavirus was apparently confined to China.
But, a few weeks later, the virus, which causes the disease known as COVID-19, became a global pandemic.
The virus, which causes respiratory illness that can be transmitted by droplets of body fluids – such as mucus and saliva, has now been reported in at least 185 countries.
Scientists, health officials and governments around the world have encouraged people to practice physical distance and avoid going out unless it is necessary.
According to data compiled by Johns Hopkins University, more than 1.79 million people have been infected and the death toll worldwide is more than 110,000. Almost 400,000 patients have recovered.
Here are some countries that have so far reported no cases of coronavirus:
Sao Tome and Principe