Last week, 80-year-old Klaus was admitted to the CVH due to high blood pressure and stomach problems but was released from the hospital on 17 September.
"Mr. Klaus is hospitalized again, as it turned out that the problems that caused him to be treated at the CVH last week have not completely disappeared. This is unpleasant, but not for long, I hope" Macinka said.
Klaus, who served as president of the Czech Republic from 2003 to 2013, underwent hip surgery in 2008, and cataract surgery four years later.
At the end of February this year, Klaus tested positive for COVID-19. Prior to that, he strongly objected to various government measures to stem the spread of COVID-19 and was even fined twice for not wearing a mask at public events.