There's something terrifying as hell about a viral outbreak which turns everyone around you into monsters that want to kill you, eat you, or assimilate you. The Walking Dead (which is not on this list, but is relative to our point) is the most popular show on TV for a reason, folks, and that reason is that pandemics, whether large or small, prey on our most primal of fears: that the world around us can go to hell at any minute.
Walking STDs; hordes of infected humans; killer mutant sheep; viral demons; flesh-eating bacteria; or even alien slugs that are determined to take over the world; the movies on this Best of Viral/Infected Horror list are sure to give you nightmares. Or even daymares. Some of them are really that scary.
For the first 6 movies in the list:
If you're in the mood for a truly quality Viral/Infected Horror flick, any of the movies in our Top Six will do you right. For our money, [REC] and 28 Days Later are probably the best of them, but then again they all bring their own unique and terrifying vision to the Viral/Infected Sub-Genre.
For the remaining:
Below are the rest of our 30 Best Viral Horror flicks, and of course, a few Honorable Mentions thrown in for good measure. Keep in mind that no "Best of" list is ever perfect, but merely a solid starting point for anyone looking to watch some great flicks.