The Blood test is done to screen for communable diseases and not DNA testing is done to see hierarchical linkages. After landing in Qatar, the Medical Commission is responsible for conducting a health exam, the purpose of which is to protect the health of the population and prevent the spread of infectious diseases from newcomers.

Newcomers should first obtain a blood-type certificate from any clinic before undergoing the Medical Commission exam, which comprises a blood test and chest X-ray. Diseases being screened include:

HIV/AIDS
Tuberculosis
Hepatitis B
Hepatitis C
Check the link http://portal.www.gov.qa/wps/portal/topics/!ut/p/c5/rY9JmqJAFITP4gE0X0Iy...