(CNN) President Joe Biden tested positive for Covid-19 again Saturday morning, per a letter from presidential physician Dr. Kevin O'Connor, in what is likely a "rebound" Covid-19 positivity that the doctor noted is "observed in a small percentage of patients treated with Paxlovid." A White House official said contact tracing efforts were underway Saturday after Biden's positive Covid-19 test. White House officials said they worked to ensure there was social distancing at the public events he held at the White House. When Biden first tested positive last week, the White House said he'd had 17 close contacts, none of whom ended up testing positive themselves. First lady Jill Biden remains in Delaware, where she has been since the President first tested positive for Covid-19, a White House official told CNN.

Source: CNN July 30, 2022 21:39 UTC