Kroger Health and Gravity Diagnostics Partner to Offer 3-in-1 Multiplex Testing at all Kroger Little Clinics Covington, Kentucky, Jan. 20, 2022 (GLOBE NEWSWIRE) -- Gravity Diagnostics’ 3-in-1 multiplex tests for flu A/B, RSV, and COVID-19 combined, to help differentiate these three types of infections in...