Monday, August 15, 2022
HomeHealthFDA recommends 3 residence exams when you're uncovered to COVID : NPR

FDA recommends 3 residence exams when you’re uncovered to COVID : NPR


WASHINGTON — When you had been uncovered to COVID-19, take three residence exams as a substitute of two to be sure to’re not contaminated, in line with new U.S. suggestions launched Thursday.

Beforehand, the Meals and Drug Administration had suggested taking two fast antigen exams over two or three days to rule out an infection. However the company says new research recommend that protocol can miss too many infections, and will end in individuals spreading the coronavirus to others, particularly if they do not develop signs.

The brand new steerage applies to individuals with out signs who assume they could have been uncovered. Individuals with signs can proceed utilizing two exams spaced 48 hours aside.

Thursday’s replace displays the evolving understanding of the accuracy of antigen exams, that are much less delicate than laboratory exams however have develop into the usual testing method as a consequence of their velocity and comfort. As an alternative of detecting the coronavirus itself, they detect protein traces, referred to as antigens, just like fast flu exams.

Well being officers have repeatedly cautioned that the exams can provide false negatives if taken too early. The Facilities for Illness Management and Prevention recommends individuals with out signs wait 5 days after an publicity. That is as a result of it typically takes a number of days earlier than the antigens attain ranges detectable through testing with a nostril swab.

All 22 residence antigen exams on the U.S. market had been licensed for emergency use primarily based on preliminary information, whereas firms and researchers gathered extra definitive metrics on their accuracy.

The FDA mentioned its newest choice displays new data on the accuracy of antigen exams. In a authorities examine, including a 3rd take a look at improved accuracy from 62% to 79%.




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