US President Joe Biden confirmed that his hoarse voice during his press conference was caused by a "cold" he contracted after contact with his grandson who transmitted the infection to him, noting that he is subjected to a "daily" test for Covid-19.

During his press conference at the White House yesterday, Friday, to talk about the American economy, Biden seemed to suffer from clear congestion and coughed several times, which prompted a reporter to ask him about his health.

"I'm fine, and I take a Covid-19 test every day. It's just that my grandson - who is one and a half years old - has a cold and loves to kiss his grandfather; it's just a cold," Biden said.

And the White House, which pledged complete transparency about the president’s health, then issued a certificate signed by the latter’s doctor indicating that Biden had undergone tests for 19 common respiratory infections - including Covid-19 and other types of Corona virus and influenza - and all of those tests came back negative.

Joe Biden spent the weekend with his family, marking the all-important Thanksgiving in the United States.

The United States fears an outbreak of Covid-19 infections with the onset of winter and the spread of the new mutant "Omicron".

Joe Biden, 79, is the oldest president in US history, which makes his health a particular concern.

And earlier last November, Biden underwent a routine comprehensive examination, after which White House doctor Kevin O'Connor announced the results of the tests, saying that the president was "in good health."