T
ThinkingSapien
Guest
You don’t know that some one is telling a lie. But I think there is the expectation that the likely hood of some one that doesn’t engage in risky behaviour to tell the contrary than the likely hood of some one that does engage in risky behaviour declaring that they don’t.How is the blood center supposed to know whether they are telling the truth about being a virgin or lying? What if someone who is an IV needle drug addict comes into a blood center, and they swear up and down that they have always used a clean needle? Should the blood center take their word for it?
That is the people could be put into two categories; those that self affirm engaging in risky behaviour and those whose behavior is unknown. The unknowns would get through this first level of filtering. Additional test are applied later on since it is expected there will be cases of HIV+ blood being donated.