There's one vaccine composition for the southern hemisphere and one for the northern hemisphere each year.
The WHO publishes the composition recommendations.
For example, the composition for the 2019/2020 northern hemisphere winter season was:
an A/Brisbane/02/2018 (H1N1)pdm09-like virus;
an A/Kansas/14/2017 (H3N2)-like virus;
a B/Colorado/06/2017-like ...
According to the little number on the lower left, this is from 2012. The situation is worse than I expected in Europe. Also, there is a map from the states:
It will be so cool to ...