Last week, after treatment with the Covid drug Paxlovid, the US President ended an initial isolation after two negative corona tests. After four days of negative tests, the virus was detected again last Saturday. O'Connor explained this with the so-called rebound effect that can occur after treatment with Paxlovid.
Biden is fully vaccinated against the coronavirus and boosted twice. He is the oldest president the United States has ever had. A medical examination last November found him "fit" to hold office.
