The Great Serum Race

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Across
  1. 3. walk through water
  2. 6. separate sick people
  3. 7. signs of illness/disease
  4. 12. illness spread to many
Down
  1. 1. mysterious or scary
  2. 2. dangerous
  3. 4. medicinal liquid
  4. 5. difficult situation
  5. 8. dog sled leaders
  6. 9. time before dark
  7. 10. died
  8. 11. transported material