This is a book of unique tips and recommendations about the most important thing in life - our health. It was created based on the recommendations of the best experts - the “About the Most Important” team, led by Dr. Agapkin. Thanks to it, you will be able to notice dangerous symptoms in time, learn what tests you need to take to get a diagnosis, how to prepare for hospitalization and various modern examinations, and you will be able to choose the right doctor. Using the information gleaned from this book, you will be able to get away from the unconditional, sometimes incomprehensible “orders” of doctors and join the fight against the disease as a united front.