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 (-5[1])Yamagata lineages are no longer circulating. This yearly product (10[1])is traditionally produced (10[1])by (10[1])growing strains in chicken eggs. (10[1]-5[1])In (10[1])North America, this (10[1])product is administered in the fall, before the onset of a virus’ namesake “season”. For 10 points, name this yearly (10[1])product, used against a respiratory virus with subtypes like H1N1. ■END■ (10[2])