Nope.
But it can help diagnosing if you got cancer by confirming it's something else.
To detect cancer you need to do Biopsy
Obvisouly, That's how they find out most diseases..
cause if you do have a disease then the doctor can cure you.
Because some diseases can be deadly so its best to get blood test so they can cure you.
A Pathologist
A sample of the donator's blood is collected at the time of donation and tested for infectious diseases. Blood is not used until the results from these tests confirm that it is safe.
Chlamydia is not a blood-borne diseases. Plasma centers and blood banks do not test for it. Get yourself tested if you're at risk.
The main purpose of regulation is to ensure the quality of blood and to prevent the transmission of infectious diseases through donated blood. Before blood and blood products are used, they are extensively tested
The blood donated by healthy persons is tested to ensure that the level of hemoglobin is satisfactory and that there is no risk of transmitting certain diseases, such as AIDS or hepatitis.
When blood is donated, samples are tested for several diseases, such as HIV. If a sample comes back positive for infection, it's discarded, and the donor is notified.
Before you donate blood, your blood is tested for sexually transmitted diseases such as AIDS, HIV, Gonorrhea, Hepatitis, viral diseases such as influenza and bacterial diseases such as tuberculosis, pneumonia.
It is not necessary for you to know your blood type in order to donate blood. Each blood donation is processed and tested in order to establish the blood type as well as the presence of infectious diseases. Your blood will be processed in this manner regardless of your knowledge of your blood type.
A person who studies blood and the diseases of the blood is a hematologist.
Military recruits are typically blood tested for various conditions and diseases, including but not limited to, HIV/AIDS, hepatitis, syphilis, and other sexually transmitted infections. The purpose of these blood tests is to ensure the health and safety of the recruits and to prevent the spread of communicable diseases within the military population. Additionally, blood tests may also be conducted to check for certain immunizations and assess general health indicators.
People can be tested by taking samples of blood, hair, skin, tissue, and/or amniotic fluid (fluid surrounding a baby during pregnancy). The sample(s) are then taken to a lab and examined under a microscope for evidence of disease.
To get educated about blood diseases one could visit a doctor specialized in blood and its diseases and ask him about them and how to prevent them in the first place.
Cord blood banks collect blood from the fetal end of umbilical cords immediately after a baby is born. In order to ensure the preservation of the umbilical cord blood, at least 75mL must be collected and tested for various diseases.