As new COVID variants emerge, so do concerns about transmissibility, mitigation Posted by covid 19 updates January 12, 2023 ShareWXYZ-TV Detroit | Channel 7 While there is no evidence so far that XBB.1.5 is more virulent than its predecessors, Dr. Sims tells me, the Omicron subvariant is highly transmissible. Hospitalizations and ICU cases are still low. covid 19 updates January 12, 2023