Keeping Up with the COVID Subvariants

The rise of Omicron mutations BA.4 and BA.5 has created a fresh wave of confusion and concern for a COVID-weary public. Dr. Brad Cutrell, an infectious diseases expert, and Dr. Jeffrey SoRelle, a pathologist whose lab at UT Southwestern is sequencing COVID-19 subvariants, tackle the tough questions about accelerated transmission rates, milder COVID-related illness, reduced vaccine efficacy, and Omicron-specific booster shots.