Many years ago, I had a young colleague named Danielle. We worked on isolating virus cultures in a laboratory, side-by-side under sterile hoods; and often our conversation meandered to stories of our respective families. Danielle had recently become engaged and was enjoying the preliminaries to her wedding, which was still some months away. Danielle had one sister, and their elderly parents were happily married, healthy and enjoying their respective retirements in the small rural town where she was born. Mostly,…..