Again, I'll perhaps provide the answer that I gave to Dr. Eyolfson. Dr. Devine can add to it.
We do not believe that it is a matter of randomly choosing a time period. The evidence was gathered in 2013 to support our five-year submission. The scientific evidence showed at the time that if we adopted that time period we would not negatively impact the safety of the system.
There is one very important element that, through your question, I would like to put on the table for the committee as a whole. A lot of the requirement that we had to do in 2013 was to ensure we could get the patient groups, who are the bearers of the risk here, onside with any policy change. For many, many years, patient groups in this country said they would not accept any change beyond the permanent deferral. We worked with them, as we did with advocates on the LGBTQ side, to say, let's take this in an incremental, evidence-based approach. We got all groups and a body of evidence to support a five-year policy. Once we had a further two years of evidence, we were able to show that a one-year policy would result in no further safety change.
The body of work we're now going to do, as Dr. Devine summarized, is to look at whether we go down to a shorter time period—six months, three months, four weeks—or we go to an entirely different screening process altogether that is not time based and that is much more inclusive for all donors, but doesn't alter the safety profile of the blood system? As Dr. Devine and I have both said, that's the evidence that is missing at the moment, and that's the research work that Dr. Devine and her colleagues are going to lead in Canada so that we can create a body of evidence to support our next submission to Health Canada.
I would argue that it's not good policy and it's not evidence-based policy to just choose another number—12 weeks or 24 weeks—because it doesn't deal with some of the concerns around this policy, which are concerns of inclusivity and fairness. We're trying to balance creating a body of evidence while at the same time recognizing the discriminatory aspects of the policy and also protect the safety of the blood for recipients, which is our ultimate mandate.
Put all of that together, and it could be another time period shorter than 12 months, or it could be a different set of approaches targeting either high-risk MSM individuals but not low risk, or not targeting anything at all. It's really that gamut of issues that we need to look at very carefully. Dr. Devine and her team will collaborate. It's behaviour-based research, social research, and scientific research all combined.