Home » Medical » Guardant Hits Milestone with FDA Nod for Liquid Biopsy TestMedicalGuardant Hits Milestone with FDA Nod for Liquid Biopsy Test Manny Johnson August 11, 2020 0 Views In addition to receiving FDA approval for its liquid biopsy test, the Redwood City, CA-based company said it recently filed for emergency use authorization for a COVID-19 test.