ba3. new variant of the sars-cov-2 coronavirus. subvariant of omicron. horizontal.

abstract africa ba3 background biology black care concept contagious corona coronavirus covid covid19 delta design diagnosis disease doctor epidemic flu health horizontal icon illness illustration infection kingdom medical medicine microbe microbiology mutation new news omicron pandemic plus pneumonia purple quarantine sars sarscov2 sign stay subvariant symbol test text united vaccine variant vector virus