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VIruses

Published on Nov 19, 2015

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1.

VIruses

What are they? How do they affect my life?
Photo by Robbert van der Steeg
2.

Viruses

  • Do not have a cell structure
  • They can be stored for many years without changing
  • During that time they do not feed, respire or excrete
  • When they are placed on living tissues, they enter the cells and reproduce
  • They destroy cells in the process and may cause di

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