Travel in the Saada region of northern Yemen is strongly discouraged because of the risk of violent civil unrest. Travel to the eastern parts of the country (Ma'rib, Shabwah, Hadramawt) and the south (Aden, Abyan, Al-Bayda') is also inadvisable because Al-Qaeda is active in some of these areas.
Report Abuse. No drug screens are done separately. Your doctor will not test for illegal drugs unless you ask him to. A CBC stands for complete blood count which has to do with your blood cells not drugs.
Blood tests. The complete blood count (CBC) measures different cells in the blood, such as the red blood cells, the white blood cells, and the platelets. The CBC is often done with a differential count (or âdiffâ), which is a count of the different types of white blood cells in the blood sample.hat doctors look for in the bone marrow. The doctors will look at the bone marrow aspirate and biopsy to evaluate the types and amount of blood-forming cells and to determine if the bone marrow shows evidence of infections, cancer cells, or other disorders.