There was a very good BBC series a few years ago called "Survivors". I really enjoyed it and was disappointed when it got cancelled after two seasons.
"An unknown virus pandemic kills more than 90% of the world's population. Those immune must strive to survive and overcome the difficulties of this new world order, hoping that the virus will not mutate."
Here's a link to the iMDb page about it. This one was made in 2008, but it looks like they made a similar series in 1975, and possibly another in 2015. I think I'm going to check those out! iMDb is a great site to explore if you're looking for new movies or tv shows. Search for something that you like, and it will recommend similar stuff.
http://www.imdb.com/title/tt1258189/?ref_=fn_al_tt_1