President Dr Arif Alvi tested positive for the coronavirus, it emerged on Monday.
"I have tested positive for Covid-19. May Allah have mercy on all Covid affectees," the president said in a tweet.
He said he had only received the first dose of the Covid-19 vaccine so far, noting that "antibodies start developing after 2nd dose that was due in a week".
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"Please continue to be careful," Alvi added.
First Lady Samina Alvi later shared that the president has "mild symptoms but is in good spirits". She said that she tested negative for Covid-19 and was quarantining.
"We had our vaccine 1st dose done but it takes time to build immunity & I request everyone to please continue to get vaccinations done & practice SOPs," she said.
The president's positive diagnosis comes a little over a week after Prime Minister Imran Khan and first lady Bushra Bibi tested positive for the coronavirus.