This is a US drama series (6 episodes I think) showing on National Geographic. Based on a book based on real events. It's about infectious diseases but I won't spoil it more than that. Starring Julianna Margolies.
I liked the first episode and wanted to watch the next! Have to wait until Tuesday, unfortunately. I just watched it on Virgin on demand but I think this first episode is shown tomorrow night. It has echoes of Chernobyl and 28 Days Later.