“The mixture of the 2 elements makes Biden a detailed contact, even when the letter of the legislation doesn’t think about him one,” Dr. Marr mentioned.
Mr. Biden examined unfavourable for the virus twice on Friday, the Biden marketing campaign mentioned. He was not examined on Saturday and left his residence for a part of the day, going to a theater to take part in a digital occasion and a church to attend Mass. The marketing campaign introduced his newest unfavourable take a look at outcome on Sunday evening. Pressed on CNN concerning the frequency of Mr. Biden’s coronavirus checks, Ms. Sanders mentioned the candidate was “examined earlier than we journey.”
Within the coming days, the Biden marketing campaign is aiming to stability well being precautions with continued journey in Florida on Monday and in Arizona on Thursday. But Mr. Trump’s optimistic take a look at has plainly injected a rare measure of uncertainty into the race.
“We solely have a couple of weeks left to the election, and so they need Joe Biden to have the flexibility to current himself to the American public,” Dr. Redlener mentioned. “And the president’s recklessness has thrown issues off observe, and the Biden marketing campaign is pissed off by that.”
However no matter his journey schedule, Mr. Biden must be examined each day a minimum of till Oct. 13, two weeks from the evening of the controversy, and doubtless even after that given his interactions with individuals on the marketing campaign path, specialists mentioned.
“Getting a unfavourable take a look at doesn’t essentially imply that you just’re not contaminated,” mentioned Juliet Morrison, a virologist on the College of California, Riverside. Early within the an infection, the quantity of the virus could also be too low to set off a optimistic outcome. “It’s a must to maintain being diligent, and assuming that you will have really been contaminated, so it’s good to be testing each day,” she mentioned.
A speedy take a look at just like the one utilized by the White Home can miss infections, particularly early on in the midst of the sickness. Mr. Biden ought to as an alternative be given the extra rigorous P.C.R. take a look at, which may ship ends in a couple of hours when not delayed by bureaucratic logjams, mentioned Virginia Pitzer, an epidemiologist on the Yale College of Public Well being.
Mr. Biden’s marketing campaign ought to make the outcomes of these checks public as quickly as they’re accessible, she mentioned: “Transparency is vital.”
Thomas Kaplan reported from Washington, and Apoorva Mandavilli and Katie Glueck from New York. Sydney Ember contributed reporting from Connecticut.