A new coronavirus test offers a cheaper, quicker way to screen for infections, but health officials say it's less accurate than the current standard for testing.
The U.S. is still struggling to increase testing to the levels that most public health experts say are essential. Harvard researchers have projected that the nation needs to be able to do 900,000 daily tests to be able to track new cases and contain new outbreaks as the country reopens. That's more than three times the country's current daily testing rate of about 275,000.White House adviser Dr.
The sample is put in a tube with testing chemicals and then into a cassette that goes into the company’s electronic reading device. There, it's exposed to a testing strip embedded with laboratory-made antibodies, the specific blood proteins made by the body’s immune system when it detects an infection. If the antigens and antibodies interact, the test is positive.
"They are going to pick up fewer people that are infected," said Simner of Johns Hopkins."So that’s where you see a lot of skepticism around using antigen tests for the diagnosis of COVID-19."For now, Simner and other experts say negative test results for people showing symptoms should be confirmed with the more accurate genetic test.
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