Why are viruses considered to be non living?

Why are viruses considered to be non living?
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Many scientists consider viruses to be non living because eachand every living organism must carry out these 7 life processes forit to be considered living: Movement, Reproduction, Sensitivity,Growth, Respiration, Excretion and Nutrition. Viruses do all ofthese things except reproduction, which they cannot do. Instead,they multiply by using other living organism's cells which hascaused a lot of debate over whether that counts as reproduction inthe scientific community.
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