New 'FLiRT' COVID-19 Variants Are Responsible For 25% Of Infections AOLCOVID-19 variants called 'FLiRT' continue to spread across the US, CDC says KSAT San AntonioCDC warns that new COVID-19 variants, nicknamed FLiRT, found in wastewater USA TODAY2 new COVID variants called ‘FLiRT’ are spreading: What are the symptoms? AL.comDoctors Warn About 2 New COVID Variants—What to Know About 'FLiRT' Strains Prevention Magazine