No.6, Zetsuen no Tempest Recommendations
+ There is a mysterious disease that spreads fast and kills people. The government is doing their best to hide it.
+ There are two main characters, both guys. One is extremely active and loves to fight while the other one is more reluctant.
+ The two main characters were friends for a while but then get separated for quite a long time. Later, when one of them is in danger, the other jumps in and saves him, reuniting them.
+ Deals with post-modern society technology/skills.
+ Studio Bones
and well this one is for the yaoi fangirls...
+ The two main characters are totally shippable.
Both have two male protagonists who are striving to protect the world. Both are dystopias. Both have the whole "disease struck the world" theme going on. Sci-fi and action.
Two young men get wrapped up in strange happenings that threaten their lives and the world around them. The main characters in both series are friends, but at the same time, they're entirely different. What they want is different. How they want to achieve it goes against the others beliefs. Can they put their differences aside to work together and save the world, or will their bonds fall apart? Will there be betrayal, or worse yet, death? You have to watch both to find out. Zetsuen no Tempest and No. 6 are not entirely identical, but when it comes to their characters, they're quite similar.