Estonian President Alar Karis said on Thursday that he tested positive for the COVID-19 virus.

"I took a PCR COVID test yesterday that turned out to be positive," Karis wrote on his social media account.

"I will self-isolate until recovery, and will continue work virtually using e-Estonia solutions. I have mild cold-like symptoms, but I feel fine overall. I have been vaccinated three times. Stay healthy!" said Karis.