US President Joe Biden has tested negative for Covid-19 in the wake of his chief spokeswoman testing positive, the White House said.

The “president was tested as well, a PCR test yesterday, and he tested negative,” Principal Deputy Press Secretary Karine Jean-Pierre told reporters aboard Air Force One, on the way to the UN climate summit in Glasgow.

Jean-Pierre said Biden's test on Sunday was not in response to news of the positive result for Press Secretary Jen Psaki, but was done “independently” and was “required for entering the UK".

Biden, 78, has been vaccinated and also received a booster shot.