The former prime minister said the directive was to ensure the safety of the people and their families, as COVID-19 infections were still rife in the country.
"Every day, more than 100 people get sick and some do not make it and die. If we do not stay safe and vigilant, do not separate ourselves from our friends, and we go out of the house, then there is a possibility for the disease to prevail.
“There used to be SARS, H1N1, but this time, we have not found the vaccine or drug that can prevent the disease (COVID-19) from spreading.
“God willing, if we comply, and are disciplined, the number of infections can be reduced and we may be able to come up with the vaccine that can prevent us from getting the disease," he said in a video posted on the 'Chedet Official' Youtube page.
In the 188-second video, Dr Mahathir also advised people to perform activities that would lessen their boredom at home.
Today is the ninth day of the MCO since it was imposed on March 18 and due to end on March 31.
However, in a special message yesterday, Prime Minister Tan Sri Muhyiddin Yassin announced that the MCO was extended until April 14.