### Question
What is the definition of priority countermeasure?


### Answer
The definition of **priority countermeasure** is as follows in *21 U.S.C. § 356*:

> given such term in section 247d–6(h)(4) [1](#356-1_1_target) 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**

