At present, in many developed countries and some developing China countries in the world, the main diseases that affect human health are no longer infectious diseases, but some chronic non-communicable diseases, such as cardiovascular and cerebrovascular diseases and malignant tumors. In addition to genetic factors, these diseases are also related to unhealthy lifestyles. Therefore, these diseases are also called lifestyle diseases, and cardiovascular and cerebrovascular diseases are a serious threat to human beings. Especially for the common diseases of middle-aged and elderly people over 50 years old, even with the most advanced and perfect treatment methods at present, more than 50% survivors of cerebrovascular accidents can't take care of themselves completely! The number of people who die of cardiovascular and cerebrovascular diseases in the world is as high as150 thousand every year, ranking first among all kinds of causes of death. Cardiovascular and cerebrovascular diseases have become the number one killer with the highest mortality rate and the "silent killer" of people's health! Therefore, cardiovascular and cerebrovascular diseases are the number one diseases of human health.
So choose: C.