### Question
How is the "priority countermeasure" defined?


### Answer
The term **priority countermeasure** is defined in *21 U.S.C. § 356* as follows -

> given such term in section 247d–6(h)(4) of title 42.

#### Citation:
  - *21 U.S.C. § 356*
  - Heading: **CHAPTER 9-FEDERAL FOOD, DRUG, AND COSMETIC ACT > SUBCHAPTER V-DRUGS AND DEVICES > Part A-Drugs and Devices**

