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Viral may refer to:

Viral behavior, or virality[edit]

Behavior like that of a virus, a small infectious agent, e.g.:

  • Viral marketing, the use of existing social networks to spread a marketing message
  • Viral phenomenon, relating to contagion theory or the "virality" of network culture, such as a meme
  • Viral video, a video that quickly attains a high popularity

Art, entertainment, and media[edit]