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. 2020 Nov 23:lmaa099. doi: 10.1093/labmed/lmaa099

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Published by Oxford University Press on behalf of American Society for Clinical Pathology 2020.

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

This work is written by (a) US Government employee(s) and is in the public domain in the US.

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Flowchart of quality control program for the VTM including sterility testing in the lefthand branch, efficacy check in the middle branch, and the first-time validation in the righthand branch. For the validation, all spiked specimens without a specified temperature were done at refrigerator temperature (4 to 10ºC temperatures). RT, room temperature; RT-PCR, reverse transcriptase polymerase chain reaction; VTM, viral transport medium. This figure was shown in an abstract presentation of these data.¹