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WASHINGTON, D.C. (LifeSiteNews) — U.S. President Joe Biden tested positive for the coronavirus again over the weekend, marking the second time in less than two weeks that the quadruple-vaccinated president has gotten COVID.
READ: Quadruple-jabbed Joe Biden tests positive for COVID with ‘mild symptoms’
In a July 30 letter, the president’s physician, Kevin O’Connor, said Biden had tested positive for COVID-19 late Saturday morning after receiving multiple negative tests last week.
“After testing negative on Tuesday evening, Wednesday morning, Thursday morning and Friday morning, the President tested positive late Saturday morning, by antigen testing,” O’Connor wrote. “This in fact represents ‘rebound positivity.’”
According to O’Connor, a small percentage of people who have been treated with Pfizer’s COVID pill Paxlovid have been observed to experience so-called “rebound positivity.”
Biden had begun taking Paxlovid immediately after testing positive for the coronavirus for the first time on July 21.
An update from Dr. Kevin O’Connor, Physician to the President. pic.twitter.com/40oqYOYTQN
— The White House (@WhiteHouse) July 30, 2022
Developed by Pfizer, Paxlovid is an oral antiviral that received Emergency Use Authorization (EUA) from the U.S. Food and Drug Administration (FDA) in December for people 12 years and older who are considered to be at high risk from COVID.
READ: Here’s what you should know about Pfizer’s new COVID drug
Though the 79-year-old president reportedly has no symptoms, he has once again entered isolation, according to the doctor’s letter.
On Monday, the president’s physician reported that Biden continues to test positive for COVID-19, and remains in isolation.
President Biden continues to feel well as he begins his week. A note from Dr. Kevin O’Connor, Physician to the President: pic.twitter.com/uEZUbxKtI4
— The White House (@WhiteHouse) August 1, 2022
Biden’s so-called “rebound positivity” after four doses of the mRNA coronavirus jab and Pfizer’s antiviral pill has once again cast doubt on the drugs’ effectiveness.
Less than a year ago, the president had claimed that “you’re not going to get COVID if you have these vaccinations” as he pushed more Americans to get the jab.
Late last month, Science Insider suggested that despite reportedly showing early promise, Paxlovid may not offer durable protection against COVID-19 in the long term. The report cited “a bevy of new lab studies” that showed that COVID-19 “can mutate in ways that make it less susceptible to the drug.”