Coronavirus Rapid Testing Falters in People Without Symptoms: Study

Mr. Bryant, of Quidel, who obtained an early copy of the College of Arizona research, praised the outcomes as “very, excellent,” citing the Sofia’s capability to root out “people who find themselves infectious.”

Quidel, which is operating a number of research of its personal, doesn’t but have definitive outcomes that present the Sofia works in individuals with out Covid-19 signs. However “primarily based on the info to this point, it appears to be relevant to that inhabitants,” Mr. Bryant mentioned of his firm’s outcomes.

Different consultants suggested warning.

Though C.T. values do have a tendency to extend as virus ranges diminish, exceptions to this pattern exist — and there may be no universal “magic-number cutoff” for infectiousness, Dr. Dien Bard mentioned.

Failing to develop the coronavirus out of an individual’s pattern additionally does not guarantee that individual is not contagious to others, mentioned Omai Garner, the affiliate director of medical microbiology within the UCLA Well being System, who was not concerned within the research.

A number of consultants famous that the College of Arizona research didn’t monitor transmission amongst its contributors, making it unattainable to attract conclusions about how, and from whom, the virus unfold.

Dr. Harris mentioned that a few of the considerations in regards to the Sofia’s accuracy might be overcome with repeat testing. Screened steadily sufficient with a speedy take a look at, contaminated individuals missed by one Sofia would in all probability be detected with the subsequent, particularly if the degrees of virus of their our bodies had been rising, Dr. Harris mentioned. He and his colleagues at the moment are gathering knowledge on College of Arizona athletes, who’re examined day by day, to research this chance. Quidel has additionally partnered with the Pac-12 and Huge Ten Conferences to conduct day by day exams.

Folks with signs or identified exposures to the coronavirus ought to nonetheless get essentially the most exact and dependable exams obtainable — those who use P.C.R., mentioned Susan Butler-Wu, a medical microbiologist on the College of Southern California who was not concerned within the research. Extra knowledge, she added, could be wanted to determine how speedy exams match into the bigger diagnostic panorama.

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