WHO tracking 4 omicron sub-variants, says preventing all COVID transmissions 'not the goal'
world-health-organization” target=”_blank”>World Health Organization (WHO)<, including BA.1, BA.1.1, BA.2 and BA.3. The infectious-disease” target=”_blank”>infectious disease< explained in a video clip she tweeted on Thursday that the agency is “watching [the] wild-nature evolve in real-time,” tracking proportions of the sub-variants. CDC DIRECTOR: STUDIES YET TO SHOW BA.2 SUB-VARIANT EVADING CURRENT VACCINES, MORE THAN OMICRON “Now, we…