There's provision within the law to take either a hair sample, a saliva sample, or a blood sample. This was discussed extensively over a long period of time. In fact, just as we were designing the kit that we currently use today, we had the unfortunate circumstance of Swissair 111 going down off the coast of Nova Scotia. The test kits that we were just evaluating were put into service at that time throughout the world to collect controlled samples for identification of those victims through relatives. At that point I guess we did a pretty good job, because every single kit came back, and we got a perfect result. So we knew we had a good idea of what to take.
The principal sample is a blood sample, which is essentially a finger prick onto a special type of card. The card itself is kind of our secret weapon. It looks like a normal piece of paper, but it was developed in the outback of Australia. They put chemicals on it to preserve the DNA so you do not have to refrigerate this, and as a result it also prevents viral and various agents like hepatitis and bacteria from impregnating the DNA and breaking it down, so it's a natural preservation material that you can store at room temperature. It also became a very nice way of collecting the sample with a small finger prick. Of all our samples, 98.5% are blood samples.
Buccal swabs, which are collected by putting a delightful-tasting piece of styrofoam in your mouth and then putting it onto the same FTA-type card or this type of paper collection card, account for only 1.3% of the samples in there. Samples are technically blood. There is discretion to take a buccal sample if you need to, or if there's a concern over an individual with regard to a disease or a hemophiliac situation. I can tell you about problems we've had with the buccal swabs, as interesting as that may sound. We've sometimes had mixtures show up in the actual DNA profile, indicating two individuals. You could imagine seeing DNA for two individuals on a card and wondering what the heck's going on here. As a scientist, you immediately think something's wrong. As it turned out, the people that we collected these samples from had mixed saliva. They had had a donation of saliva from another individual and had deliberately done this to try to confuse us in the national data bank, so the next time we went back we would take another type of sample. It would be hard to do that with blood unless you had a blood transfusion right before we took a sample. But blood tends to be the one we use.
It goes on a piece of white card. There's an associated form with that card that has all your personal information. There's a link with a bar code, essentially like a supermarket code on it, that ties this personal information, including fingerprints, to the donor card. That has no direct identification of the individual on it, but the name of the police officer who took the sample, as well as where he or she is from, would be on the card. It comes into the national data bank. We have a kit reception area. Those people are trained to know fingerprints, so they match up the personal information on a separate sheet, called a 3801, with our card to make sure there have been no mix-ups, or what have you, that they hadn't collected two individuals at the same time and mixed up the cards. So it's a quality assurance procedure. At that point, the cards themselves, which are anonymous, and have essentially a special number that we encode in them, go through the entire database. They are uploaded, and there's no identity attached to them. You just become a number in the national DNA data bank.
We often have people phone up and ask if a specific person is in the data bank. The only way they would know that is by checking the files from CPIC, the Canadian Police Information Centre, to see if there's a flag there that says a sample has been collected for that individual. The form itself, with all the personal information, goes to a completely different registry where it's entered and verified and the criminal history is checked out. At that point there's a clear, distinct division between the personal information and the genetic or DNA information. So that's essentially how our process works.