What are Viruses?

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Across
  1. 3. _infection involve replication of virus that leads to symptoms
  2. 5. _cellular parasite will fail if can't find a host
  3. 7. Come in all shapes and sizes which makes creates
  4. 8. influenza virus
Down
  1. 1. Vital for a healthy life
  2. 2. family called Retroviridae
  3. 4. A complete virus particle
  4. 6. chronic infection