Plot:
The Tomb of King Tut was said to have a curse upon it, and many of those involved in the dig died, some through mysterious means...perhaps a new virus? Be that as it may, Egypt was obsessed with life after death, believing that you literally came back to life, thus the reason as to why the organs of the individual were buried along with them in ceremonial jars along with all their wealth and prized possessions. Perhaps there was more to their beliefs than simply mythology...
In regards to mummies, Code: Veronica showed us that the dead can indeed be reanimated even after a decent length of time in being buried. The zombies that rise from the graves there look quite decayed. However, a mummy has had it's organs removed and been dried over the countless years...rendering it practically people jerky. In combination to such, the brains of every mummy are REMOVED, which is a vital aspect of any viral infected being. So, none of the viruses would be able to reanimate a mummy...but, perhaps, a virus would be able to use the genetic mass to mutate the husk into something useful. What this would be is unknown to me...