Strictly speaking, infectious diseases are different from infectious diseases, because infectious diseases include a wider range of diseases, most people have had infections, such as cold, flu, skin boils and carbuncles, tonsillitis, bronchitis, pneumonia, bacterial dysentery, urinary tract infections, appendicitis, hepatitis, malaria, intestinal roundworms, all of which are diseases that can be treated by infectious diseases. Infectious diseases are diseases that spread in a certain area at a certain time, such as bacteria, viruses, chlamydia, mycoplasma, rickettsia, helminths, parasites, etc. They are all infectious diseases. However, at present, many infectious diseases are integrated into the infectious disease department, but for example, tuberculosis, which is a serious disease that needs to be strictly controlled by the state, still needs to be treated in a special infectious disease hospital.