Hon CHRIS HIPKINS: I don't think that there's a specific—I don't have that information around the overall time frame. Some people have previously tested positive and then some months later have tested negative. Others have tested positive and then some months later, after they have well and truly recovered, have still tested positive, even though they had well and truly recovered. So I don't know. I can find out if there is an average time, but I'm not sure that that would necessarily tell us much.