Thanks to everyone for your replies. I feel pretty reassured now (assuming I'm a match). I haven't tried to give blood for many years because they always turn me down when I tell them I had yellow jaundice at age 8. No testing was involved. I don't know much about the subject, but I'm assuming if it had been B or C, it would have stongly affected my health over the years. Thanks again.
It is my understanding, which is limited, that not everyone who has had hep A has the anti-bodies.
Of course, what I know about virology could be written on a pin head so take that with a grain of salt.
A quick check on Internet says that one-third of the Americans have evidence of past hepatitis A infection, and thus are immune to hepatitis A.
Intersesting question. Most people who have had hep A resolve the disease fully and are not at risk for transmitting it. Since they are using HCV+ livers for transplants nowadays (into other HCV patients) I don't see where using a liver with hep A antibodies would be a problem, unless it had an effect on the living donor procedure.
I can't answer your question specifically but my doctor told me that 90% of the adult population has had Hep A and most never knew they had it.