virus

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Across
  1. 5. existing or spreading onto every part of something
  2. 7. organisms such as bacteria being microscopic size
  3. 8. the act of being alone
  4. 10. giving trouble or anxiety
Down
  1. 1. "normal" life back after therapy or training
  2. 2. mild illness
  3. 3. an outbreak of a disease
  4. 4. spreading all over the world
  5. 6. difficult to analyze or explain
  6. 9. a sudden rise within the disease