President Joe Biden tested negative last week after he was believed to have had close contact with the first lady, a White House official told CNN. The President had also taken Paxlovid when he had Covid-19 last month and eventually tested positive in a recovery, after testing negative. While self-isolating in South Carolina during her first diagnosis, the first lady worked on her upcoming fall planning for her job as an English professor at Northern Virginia Community College. Biden has since been self-isolating at the family’s beach home in Delaware, where he had traveled after testing negative before the reinstatement case. This story has been updated with additional details. CNN’s Kate Bennett and Shawna Mizelle contributed to this report.