Blood donation question...?

There's some sort of disease ( ur color turns little yellow...), if u were infected when u were a kid, u cant donate blood anymore, so my question is: What is this disease and why u cant donate??

Hepatitis A - you cannot donate blood if you have had hepatitus A in the last 12 monthts. You can't donate because you can infect the person who receives your blood, and since that person is already in a weakened condition it could be very serious for them.

Hepatitis A is relatively mild and usually clears up within 2 months. No permanent damage is done. There is a vaccine for hepatitis A

Hepatitis B and C - you should never donate blood - ever. You do not "get over" having hepatitis B and C - if a patient receives blood tainted with hepatitis B or C they could die soon after the transfusion because they are already weakand now their liver is infected. If they do not die soon after the transfusion--there is a strong likihood that they will die of liver failure or liver cancer (just as the donor is likely to).

Hepatitis B is serious and can cause liver damage, liver cancer, and even death. There is a vaccine for hepatitis B

Hepaitis C is very serious and is responsible for about 1/2 of all the cases of fatal liver disease and liver cancer in the U.S. There is no vaccine for hepatitis C

? hepatitis

The infectious cause for "yellow jaundice", where your skin, eyes and urine turne yellow, is hepatitis. This is a viral infection that gets in your blood and travels to and infects your liver. The yellow color is the result of liver dysfunction.
This is generally transmitted from person to person by contact with contaminated blood. When you donate blood the blood bank tests for bloodborne illness including hepatitis to prevent transmitting this disease to potential blood recipients. If you carry the hepatitis virus in your blood you will not be accepted as a blood donor. It is not uncommon for people to carry the virus without overt signs of illness.

If you ever tested positive for hepatitis B or C, you will not ever be able to donate blood. That's because you can be a carrier without knowing it. All blood is tested to detect the antibodies of a prior infection, and if they discover them you would be notified to seek care. And you would be told you could not donate blood again.