New 'FLiRT' COVID-19 Variants Are Responsible For 25% Of Infections AOLNew COVID variant 'FLiRT': What to know about spread, symptoms USA TODAYCOVID-19 variants called 'FLiRT' continue to spread across the US, CDC says KSAT San AntonioHere's what Arizonans need to know about the FLiRT COVID-19 variants. The Arizona Republic