Comparison of SARS-CoV-2 PCR-Based Detection Using Saliva or Nasopharyngeal Swab Specimens in Asymptomatic Populations.

Microbiol Spectr · 2021 · PMC8552704 · PMID 34431689

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an overall trendno p-value reported

Those studies reported an overall trend of lower PCR cycle threshold ( C T ) values using NP swab samples, compared to saliva samples ( 2 , 3 ), while a few studies reported no significant differences ( 4 – 6 ).

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