the development and use of equipment and systems that protect against bioterrorism (= violent action using living matter, such as bacteria, to harm or kill people for political reasons)

They have a store of biodefence drugs and vaccines that can be flown anywhere in the nation within twelve hours. 他们在某处存储了用于生物武器防卫的药品和疫苗，可以在十二小时内空运至全国任何地方。