We are undertaking that research into immunology. It is incredibly important for people, like me, who have had the disease to know the likelihood of getting it again and of transmitting it again. Both are very important for obvious reasons—one for personal health; the other for public health—but it is not just about the antibody response; is also about the T-cell response. Both of those are different parts of the immune system responding. We are making progress in our understanding of that, but not yet enough to be able to recommend that people who have had the disease, or have antibodies, act in any different way from the rest of the community.