Sinn Féin president Mary Lou McDonald has said she has received a positive diagnosis for Covid-19, after being tested on March 28.
She said she experienced weeks of being "very unwell", adding she had a setback to her recovery at the weekend when she developed pleurisy.
Ms McDonald said she plans to be back at work next Monday.
"My thoughts and solidarity are with everyone who is sick at this time, and my gratitude is with our doctors, nurses, carers and everyone who looks after us," she said.
"Thanks to everyone who has asked after me and sent good wishes. Your kindness is much appreciated and I'll be back next week."
Ten people in Northern Ireland have died with coronavirus, according to today's daily bulletin from the Public Health Agency.
This brings the total number of deaths in the region to 134.
The Public Health Agency also confirmed 85 new positive tests for Covid-19 in Northern Ireland, bringing the total number of cases to 1,967.