Czech president appoints a new prime minister — from inside a transparent cube.

President Milos Zeman of the Czech Republic, who tested positive for the coronavirus on Thursday, appointed the country’s new prime minister on Sunday while sitting inside a transparent cube.

Mr. Zeman, 77, was discharged from a hospital in Prague on Saturday and is currently required to isolate. He rolled in a wheelchair into the clear box, pushed by a worker wearing a full protective suit, in order to appoint Petr Fiala as prime minister. He was originally scheduled to take that step on Friday but the event was delayed after he tested positive.

If it had happened two years ago, the sight of a world leader confined to a cube might have been considerable cause for alarm, but on Sunday the event proceeded as normal, with the other participants masked and moving freely around the room. Mr. Fiala and the other speakers stood at a microphone and spoke toward the cube, while Mr. Zeman spoke from inside using another microphone.

Mr. Zeman’s health has been a source of concern and speculation inside the country; he has diabetes and neuropathy in his legs, which caused him to begin using a wheelchair in April. He was hospitalized in October, but the government offered little information on his specific health issues.

He was discharged on Thursday after being treated there for six weeks, only to be readmitted to the hospital hours later after testing positive for the coronavirus.

Like much of Europe, the Czech Republic is dealing with a surge of the virus, setting a record on Friday with nearly 28,000 new cases reported. About 59 percent of the population has been fully vaccinated, according to Our World In Data.

Over the last two years, several other world leaders, including Prime Minister Boris Johnson of Britain, President Jair Bolsonaro of Brazil and former President Donald J. Trump of the United States, have contracted the coronavirus and recovered after hospital stays.