Jones & Bartlett Learning (JBL) Module 4A Practice Exam 2026 - Free JBL Module 4A Practice Questions and Study Guide

Spread across many countries or continents with sustained transmission marks a pandemic. The 2009 H1N1 swine flu and the 1918 Spanish flu both spread globally, affecting large numbers of people and crossing borders quickly, which fits the definition of a pandemic. An epidemic, by contrast, is confined to a particular region or population, not the entire world. Parasitic infection describes the type of pathogen, but influenza is caused by a virus, not a parasite. Uncontrolled outbreaks isn’t a precise classification; pandemics specifically denote global reach, not just difficulty in control.