Ultimately he was directed to an emergency room in his metropolis, which was anticipating him. He was given an infusion of the drug on Monday. He’s feeling a lot better, he stated.

Each Mr. Trump and Mr. Christie, a longtime buddy of his and former New Jersey governor, bought the antibodies earlier than they have been accepted by the F.D.A. Dr. Caplan, the medical ethicist, stated he had no downside with Mr. Trump, 74, getting the remedy — he’s, in any case, the president, “a particular individual unto him- or herself.”

However Mr. Christie’s entry seemed to be extraordinary. Mr. Christie, 58, was provided participation in a Regeneron medical trial however turned it down, an individual conversant in his remedy stated, fearing he would possibly obtain a placebo. As an alternative, he obtained the Eli Lilly remedy. He’s chubby and has bronchial asthma, and thus could have been an excellent candidate, Dr. Caplan stated, although he questioned if equally located sufferers would have gotten the drug.

Dr. Carson, 69, bought the Regeneron cocktail after it was accepted, then took to Facebook final month to say he was “desperately ailing” with the coronavirus till the president intervened.

“President Trump was following my situation and cleared me for the monoclonal antibody remedy that he had beforehand obtained, which I’m satisfied saved my life,” he wrote, including that “we should prioritize getting comparable remedies and care to everybody as quickly as doable.”

Mr. Giuliani’s remedy is much less clear. Calling into ABC Radio from his hospital mattress on Tuesday, he stated particularly that he had obtained two medication — remdesivir, which has F.D.A. approval for remedy of Covid-19, and dexamethasone, a steroid.

However he additionally stated he had obtained the identical remedy “cocktail” because the president: “Precisely the identical, his physician despatched me right here; he talked me into it,” Mr. Giuliani stated of Mr. Trump’s doctor, including, “The minute I took the cocktail yesterday, I felt 100% higher. It really works in a short time, wow.”