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. (-5[1])In the USA, this product is moving to a trivalent composition as the Yamagata lineages are no longer circulating. (10[1])This yearly product is traditionally produced by growing (10[1])strains in (10[1])chicken eggs. In North America, this product is administered in the fall, before the onset (10[1])of a virus’ namesake (10[1])“season”. (10[1])For 10 points, (-5[1])name this yearly product, used against a respiratory virus with subtypes like H1N1. ■END■ (0[1])