Book excerpt: COVID-19: Current Challenges and Future Perspectives informs readers about the current status of knowledge on COVID-19 infection. The book begins by presenting basic information about the history, epidemiology, pathogenesis, diagnosis, treatment and preventive measures against COVID-19. The second part of the book contains information about the repurposing of drugs, herbal medicines, and immunotherapy against COVID-19 infections. Integrating both general and advanced information about Sars-cov-2, this book updates a wide range of readers including students, researchers (virologists, pharmacologists), health care professionals (physicians, nurses, pharmacists, paramedics) and the general public on novel coronaviruses and COVID-19.