Typically, it would cover one of the H3N2 and one of the H1N1 variants, along with one or two of the influenza B strains, depending on if it is a trivalent or a quadrivalent vaccine. I do not know specifically which influenza variants are included this year, but I can find out for you if you want.
I used to brief people on which flu vaccine strains were selected each year.
I got the quad this October. I’ve always wondered how they project which strains to target.
If I recall correctly, they chose not to include H2N3 in the vaccine this year, I’d be very curious to know if that is the strain going around this year.