The question is: how many cheaters would actually donate blood!...
more detail you can read from here:
http://ayuschka-asia.blogspot.com/2008/08/theres-something-bit-queer-going-on.html
more detail you can read from here:
http://ayuschka-asia.blogspot.com/2008/08/theres-something-bit-queer-going-on.html