The original strain. Sorta like Coke Classic.
BA.2 33% more infectious than ‘original’ Omicron COVID strain, study finds
The only major question remaining is "How lethal is it?"
@Petter
Even if less lethal at the individual level it could infect far more people than in previous waves and thus kill comparable numbers of people.
See the curves compared between Delta and Omicron for Florida here:
[amp.palmbeachpost.com]
@Scott321 The two graph lines actually look pretty close together, so I wouldn't make that big a deal about one variant over the other.