These products can include a pdm09-like element that underwent quadruple reassortment. A universal form of this product has been designed using the stem of a hemagglutinin protein, which is one of two types of surface proteins found on the target of this product. In the USA, this product is moving to a trivalent composition as the Yamagata lineages are no longer circulating. This yearly product is traditionally produced by growing (10[1])strains (10[3]-5[1])in chicken (10[1])eggs. (-5[1])In North America, this product is administered in the fall, before the onset (10[2])of a (10[1])virus’ (10[1])namesake (10[1])“season”. For 10 points, name this yearly product, used against a respiratory virus (0[1])with subtypes like H1N1. ■END■ (10[1])