The prime minister of Estonia announced on Monday that she tested positive for COVID-19 and will self-isolate.

Kaja Kallas, 43, who became the country’s youngest female head of government in January, said that other than a small fever she was feeling well and has not developed any other symptoms, The Associated Press reported. 

In a Facebook post on Monday, Kallas said she doesn’t know how she was infected with the virus but that she is “closely monitoring my health and staying home until I recover.”

She added that she would carry out her prime minister’s duties from home, including holding remote Cabinet and other meetings, the AP wrote. 

Estonia’s coronavirus situation has worsened in recent weeks, according to the AP, as the country’s health care system and hospitals are struggling to accommodate COVID-19 patients with current resources.

Estonia is home to 1.3 million people.

On Monday, the country reported 1,281 daily new coronavirus cases, raising the total number of cases to 86,086, and 728 deaths, according to the AP. Authorities say 711 coronavirus patients are being cared for in hospitals throughout the country.