Do we really need to wear masks? The authors conclude we do not. This book reviews the evidence for and against widespread public masking as provided by the Centers for Disease Control and the Mayo Clinic, as well as top scientific publications such as the New England Journal of Medicine and The Lancet. Questions raised in this book are the effect of masks on oxygen and carbon dioxide levels, how SARS-CoV-2 spreads, the effectiveness of various types of masks, those who are most vulnerable to COVID-19, and whether our children should go back to school in the fall, and if so, what measures they should take.