Thank you for your interest in the PubChem database and the System and Method for Testing for COVID-19 record (patent US-2020279585-A1)The priority date for patent US-2020279585-A1 that Google has supplied is based on a series of separate-but-related patent applications dating back to 2015. Of those various applications, only US-2020279585-A1 mentions COVID-19, and it was filed on May 17, 2020.
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