Coronavirus PCR test accuracy ‘may vary by time of day,’ new study finds lifesitenews.com

The accuracy of coronavirus PCR tests “may vary by time of day,” according to a new study. In an analysis of 31,094 results from PCR throat swab tests, researchers from Vanderbilt University found “a two-fold variation in test sensitivity” based on the time that the swabs were administered.

Tests were most likely to come back positive when taken around 2 p.m., the researchers said in a pre-print paper published on medRxiv earlier this month. The skewed pattern “suggests a cyclic pattern in viral shedding, with a peak in the early afternoon,” they added…

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