covid-19

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Across
  1. 4. screen and refine
  2. 7. People study on virus
  3. 8. novel coronavirus variant
  4. 9. the jump of a virus from one to more
  5. 10. make patients separated
Down
  1. 1. technique for delivering a vaccine to the human body
  2. 2. sterilization of liquid
  3. 3. adjective of precaution
  4. 5. the process and principles of disease occurrence
  5. 6. media for being infectious