They could be any ordinary couple in their 30s with a daughter named Sylvie, who just celebrated her fifth birthday. But the reality behind the picture-perfect smiles of Paul and his wife, Viviane, is grim. Viviane and Sylvie are HIV-positive, and Paul, a 37-year-old with a degree in medicine, can't stop wondering why he never contracted the illness. "Is there any research done on couples like us?"