I'll applaud you for your desire to help.
However.....as someone who's peripherally connected to the blood industry (not personal, but know people well inside it.)
Please do not lie on the screening questions. If it's discovered after the fact that the donor has lied, anything produced from that donation is immediately recalled. That includes pooled products as well. If the products have already been transfused, the attending physicians are notified. Yes, it's a huge amount of work, along with potentially wasting other donations.
OhCharlie, I'd agree that as a recipient, yeah, I'd want as many people as possible to be able to donate. However, the blood industry has to err on the side of caution. The goal isn't to play the numbers game, it's to produce as close to a zero risk product as they can. For instance, a donor called in to get the results of the testing on their donation, HiV specifically. The blood center immediately went into overdrive to recall anything that their donation went into, a week after the donation. Given that the donor obviously felt they were at risk, I'd say the blood center was well & truly justified in disposing of the donation & everything that went with it. It also results in thousands of dollars of testing & supplies and staff time being utterly wasted. AFAIK, most centers are doing pooled HiV tests, only doing individual tests to find the particular donor when the pooled test comes back positive (whole lot gets quarantined in that case until the situation is resolved.) And before you say it, IIRC, there is a small window of opportunity where the donation can be infectious but still pass the test. This is why they rely heavily on the screening questions as well as testing.