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Therese Raphael and Sam Fazeli

What We Know About Fast-Spreading Omicron Subvariant BA.2

The omicron variant has a faster-spreading subvariant that is becoming dominant in Denmark and increasing in the U.K.

Open up.

Open up.

Photographer: Pierre Crom/Getty Images Europe

Viruses mutate. So it came as little surprise that the fast-spreading omicron variant (known as BA.1) has a faster-spreading subvariant, BA.2. The latter is becoming dominant in Denmark, increasing in the U.K. and quickly spreading elsewhere. New studies show that getting a mild omicron infection may not give a robust enough immune response to protect against another omicron infection, of either BA.1 or BA.2.

Bloomberg Opinion columnist Therese Raphael speaks to Bloomberg Intelligence Pharmaceutical analyst Sam Fazeli about what BA.2 means for living with the virus.