That's right. The screening process prior to the actual donation takes care of those questions; they ask about hepatitis and other diseases and certain medications that one must not be taking in order to donate. They check your iron levels, too.
Hope this helps. :)
I have a hereditary disease called hemachromatosis. It is also called iron overload or iron storage disease. It is the opposite of being anemic. My body keeps too much iron. I found out about this since my father has the disease also. I was able to start treatment earlier in life than my father. It took more than 2 years to diagnose my father with this disease in the early 70s. No one knew about it back then. The main detector of iron storage is serim ferritin. This is not included with a basic metabolic panel when your doctor orders a drug test. Also, we look at serum iron, transferrin saturation and total iron binding capacity.
Since the primary use of iron by the body is in the production of red blood cells, if the body's red blood cell count is reduced by therapeutic phlebotomy, the body goes into a mode of releasing stored iron to make new red blood cells thereby reducing the amount of iron for hemachromatosis patients. When I first started giving blood more than 10 years ago, I gave a full pint twice a week for 4 months and brought my serum ferritin down from 2200 to 250. I continued once a week thereafter for several more months until I was considered "de-ironed". Now I have a prescription from my hematologist for weekly therapeutic phlebotomies down to a hematocrit of 33. I actually have not donated since my cancer surgery 6 months ago, and my serum ferritin sits at 13, a low number for most people, but a good number for me.
There is another way to remove iron from the body called chelating (key late ing). But it also removes other trace metals that you then have to put back in your body with supplements. I am of the opinion that if it ain't broke, don't fix it.
The Blood Centers in Louisiana take my blood for free. Hope this lasts. It is convenient and quick. I think they use parts of the blood. I have given many more pints in a year than are allowed for most because of my prescription. Since I keep my iron level under control, I am able to live a normal life. All of my brothers (3) and sisters (3) also have this disease. Left untreated, it can lead to stroke, cirrhosis of the liver, congestive heart failure and bronzed diabetes. So far, only one brother has diabetes.
Prior to getting treated for this disease, I rarely gave blood. Now
I have more T shirts from the Blood Center than any other clothing item in my closet.