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A few representative drift strains include influenza A/ equine/Fontainebleau/1/79 (H3N8), influenza A/ equine/Kentucky/1/81 (H3N8), influenza A/ equine/Sussex/1/89 (H3N8), influenza A/ equine/Saskatoon/1/90 (H3N8), and influenza A/ equine/Kentucky/1/81 (H3N8). Numbers like 81 stands for the year.