I am pleased to present the edition of book ‘‘Important Issues in He- alth Sciences’’ which deals with different important medical and cli- nical subjects including up to date COVID 19. The book is divided into 10 chapters including basic, medical and clinical subjects. I would like to thank all authors for their efforts in the writing and submission of chapters of this book. I would also like to express my thanks and appreciation to those contributed remotely or closely in the preparation of this book. I wish them continued success. I hope that the book will be beneficial for the medical and educational work.