In late 2019, health officials noticed a new disease spreading in Wuhan, China. They named it COVID-19. Within a few months, it became a pandemic that dramatically changed life for nearly everyone on Earth. Millions of people became sick, and hundreds of thousands died. Leaders ordered whole states and countries to stay home to slow the disease’s spread. Companies closed or went out of business. Meanwhile, health-care workers on the front lines saved lives and raced to find treatments. In the Core Library Guide to COVID-19, readers will learn about the disease, how it spread across the globe, and the ways it has changed society. COVID-19 is a disease caused by a virus called SARS-CoV2. Like all viruses, it is far too small to be seen by the naked eye. Yet this virus and the disease it caused had an enormous impact on the world. Understanding COVID-19 explores how the virus and the disease work, examining what made them so dangerous and what health officials learned about fighting them. Features include a glossary, references, websites, source notes, and an index. AGES: 9 to 11