The drug companies Pfizer, Sanofi - Aventis and Nektar Therapeutics developed it.

是由辉瑞公司, 赛诺菲-安万特公司及内克塔治疗公司联合发明的.

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Sanofi Aventis produces about 225 m doses of seasonal flu vaccine.

赛诺菲可生产约2.25亿支季节性流感疫苗.

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This move, first initiated by Rhone - Poulenc, was fully endorsed by its successors Aventis and then Bayer.

该举措首先开始于罗纳普朗克,并先后被它的接任者安万特和拜耳认同.

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