- Why does the pcr covid test take so long

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Content is fact checked after it has been edited and before publication. Learn more. Nick Blackmer. Fact checked by Nick Blackmer. Share Tweet Email Print. The persistence of a positive result depends on which test was used, since the polymerase chain reaction PCR test is more sensitive than the rapid antigen tests that can be administered at home.

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  The downside? According to the website of the private clinic CityMDyou can expect a 3- to 5-day wait to receive your results. Large commercial labs can do a lot. Even though lab-based PCR tests, which are done at large labs and academic medical centers, can take several hours to produce a result, the machines used can test high numbers of cases why does the pcr covid test take so long at once. What Takes So Long? The test kit instructions will tell you the time you need to wait before reading your result.  

Why does the pcr covid test take so long

  "Typically, a PCR test takes six hours from start to finish to complete," says Kelly Wroblewski, director of infectious disease programs at the. You should receive your test results as early as 24 hours after sample collection, but sometimes it can take a few days, depending on how long.