While the PCR test has a longer turnaround time, it has a higher accuracy rate.
“The two big tests we have available right now are the Antigen test. That’s the at home test, its usually very rapid and the PCR test. That’s the test that we use in the hospital,” said Dr. Peter Chin-Hong, an infectious disease specialist at UCSF.
“One way of thinking about when you might do a rapid test for sure if you have symptoms later on in the course of the disease,” Chin-Hong said. “Definitely three days or so, after exposure early on you’re not going not going to pick it up positive on the at home antigen test and the PCR test may be positive.”
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