In 2020, the illness called COVID-19 changed our world forever. However, it wasn't the first pandemic to affect human lives, and it likely won't be the last. This in-depth and honest book takes readers through the history of pandemics and the idea of public health, as well as the background of COVID-19 and the coronavirus that causes it. Manageable text makes a sometimes uncomfortable subject clearer and more understandable, and a glossary explains key terms behind the science and history involved. Color photos, primary sources, and stories of young activists making a difference in the pandemic draw in readers looking to understand more about this important topic.