This was announced by his attending physician in an official letter, which is published on the website of the White House.

Biden will continue to be in quarantine and run the country from residence.

On July 21, Biden passed a positive test for a coronavirus infection, while on July 27 the test showed a negative result and the head of the United States announced his return to full-time work after suffering COVID-19.

On July 30, Biden tested positive for COVID-19 again and went into quarantine.