Sanofi-Aventis has offered $550 million to buy out UK-based vaccine maker Acambis. Acambis’ board has agreed to the acquisition. Sanofi’s vaccine division, Sanofi Pasteur, has worked with Acambis for more than a decade and is currently partnered with it for three projects. Sanofi Pasteur president and chief executive officer Wayne Pisano remarked, “We are delighted that the board of Acambis has unanimously agreed to recommend our proposed acquisition. This mutually beneficial acq...