Coronaviruses can cause illness, severe disease, and death; for example, Middle East respiratory syndrome (MERS), severe acute respiratory syndrome (SARS), and COVID-19. Vaccine development and antiviral drugs are challenged by the propensity for viral mutations allowing these viruses to evade such therapies. There are a number of bioactive compounds from natural sources, which can exert health benefits and act as antiviral therapies such as anti-inflammation, antioxidative stress, and immune regulation. This book summarizes research on the potential efficacy and underlying mechanisms of bioactive compounds and traditional medicines against SARS-CoV-2.Key Features Summarizes the potential benefits of bioactive therapies for coronaviruses Focuses on COVID-19, but also covers MERS and SARS Provides alternatives to vaccines and other antiviral drugs whose efficacy is reduced by viral mutations Relevant for clinicians and public health officials