I can't speak to the travel ban, but I can speak to the blood donation ban.
Most other countries are using a 28-day deferral. This is based on the fact that the original risk calculation assessments were done by an American group, and they assessed only 14 days and 28 days. When you do the calculations for 14 days, you realize that it might not be long enough, so while we're trying to understand more about the Zika virus and really apply the precautionary principle, they said to go with the 28 days, that it looks like it's probably safer until we understand more.
Canada did something a bit different. We said that what the Americans have done is very nice, but we wanted to do a Canadian calculation that's relevant to where blood donors travel from Canada and to what our risks are in this country. We had the ability to look at 14 days, 21 days, and 28 days, because those are three marks we can put in our computer system that are already there. We don't have to redesign a computer system to bring in that deferral. When we did those calculations, we realized that the deferral of 21 days was adequately protective, and it was just as good as the 28-day deferral. We went with the shorter deferral because it was less impactful on the blood supply.