Research and analysis

COVID-19: monitoring temperatures of SARS-CoV-2 PCR samples via Royal Mail

The National Testing Programme validated polymerase chain reaction (PCR) kits using spike-in virus samples to test how long a sample could remain in transit.

Applies to England

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Polymerase chain reaction (PCR) test vials and swab kits and lateral flow devices (LFDs) distributed by the UK Health Security Agency (UKHSA) for testing for the presence or absence of SARS-CoV-2 are highly temperature sensitive and must be stored appropriately.

A pilot study was undertaken to monitor the temperatures reached within the standard packaging used for return of PCR test samples during transit when tests are returned via post by subjects. This was followed by bespoke series of studies designed to investigate potential additional scenarios of raised temperatures and impact of longer periods of raised temperatures on PCR sample stability. A summary of the findings from these are presented in the enclosed report.

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Published 27 April 2023

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