President Joe Biden on Saturday has once again tested positive for COVID-19 after several tests indicated negative results throughout the past week.

Biden physician Kevin O'Connor said in a memo that the president tested positive through antigen testing.

"After testing negative on Tuesday evening, Wednesday morning, Thursday morning and Friday morning, the President tested positive late Saturday morning, by antigen testing. This in fact represents 'rebound' positivity."

O'Connor said that the president president was feeling "quite well" but would "reinstate strict isolation procedures."

This is a breaking news story.

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