Blood tests are generally able to detect AIDS, but only if the blood test contains HIV antibodies or HIV RNA quantification. If the relevant items are not included, it is not possible to check for AIDS. There are many items that can be looked at through a blood test, so if a specific scope is not specified and there is no clear purpose, it is likely that AIDS antibodies will not be checked and it will not be possible to check for AIDS. In many general units, when a person’s physical condition is examined, many items are included, including routine blood tests, liver function, kidney function, even cardiac enzymes, and other items such as blood lipids, blood sugar, electrolytes, etc. These items generally do not include HIV antibodies and cannot detect the presence of AIDS. In clinical practice, if a blood test is to be performed before surgery, it is likely to check for diseases that can be transmitted through blood, which can include AIDS. Therefore, only when the purpose is clear to know whether there is AIDS, or to check whether there are diseases that can be transmitted through the blood, will HIV antibodies be tested, and only then will it be possible to detect AIDS.