What’s the difference between bacteria and virus?

Question: What's the difference between bacteria and virus?
- Keywords:
  bacteria,
  virus
Asked by meg123 to Amy, Karen, Sarah, Vijay, Will on 18 Jun 2012. This question was also asked by niamhcarr.
- Sarah Martin answered on 18 Jun 2012:
  
  Hi again meg123! Bacteria are single-celled organisms which are tiny little animals. Many live inside and on our bodies and help us digest our food and protect us from dangerous bacteria!
  Check out this video!
  
  Viruses on the other hand are spheres of coated DNA – they are not alive, but they can enter our cells and our cells will reproduce them and release them again.

meg123 commented on 18 Jun 2012:

Thanks for the video Sarah! It was very helpful! I <3 your work!

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Question: What's the difference between bacteria and virus?