Bavarian Nordic A/S plans to buy two travel vaccines plus a phase III chikungunya vaccine candidate from Emergent Biosolutions Inc. for about $380 million. Emergent will receive a $270 million up-front payment and perhaps as much as $110 million in future milestone payments. The vaccines are Vivotif, for preventing typhoid fever, and Vaxchora, for preventing cholera caused by Vibrio cholerae serogroup O1. Both oral vaccines have U.S. FDA and European approvals.