Zeman had to return to the hospital after a positive Covid-19 test.
The president’s office confirmed on Thursday that Zeman would return to the military hospital in Prague, according to a report from Reuters.
The 77-year-old had previously been released after more than six weeks of treatment and had planned to recover in his presidential residence in Lany Castle.
However, his spokesman confirmed that Zeman had tested positive for the Coronavirus, despite having had the booster shot.
“The president’s program will be suspended during treatment for Covid-19,” it said in a statement. Zeman was due to swear in the new Czech coalition government led by Petr Fiala on Friday.
President Zeman had already spent some time in intensive care after he was admitted on October 10, the day after the Czech parliamentary elections.