South Africa’s President Cyril Ramaphosa is self-quarantining after a guest at a dinner he attended later tested positive for Covid-19.
The president is not showing symptoms and will perform his duties remotely, his office said in a statement.
Mr Ramaphosa is the latest world leader forced to self-quarantine.
US President Donald Trump and UK Prime Minister Boris Johnson are among leaders who have contracted Covid-19.
South Africa has reported about 720,000 Covd-19 cases and 19,000 fatalities, the highest in Africa.
In March, Mr Ramaphosa had imposed one of the strictest lockdowns in the world to curb the spread of the virus, but later eased restrictions.
Mr Ramaphosa would be tested “should symptoms manifest”, and was currently in self-quarantine, his office said.