y

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Across
  1. 2. Branch of medicine that treats the skeletal system and associated structures
  2. 4. Contamination of the natural environment
  3. 5. An essential part of hygiene, especially before eating, to avoid infections
  4. 6. An STD caused by HIV
Down
  1. 1. Condition that causes uncomfortable, difficult and infrequent bowel movements
  2. 3. Common viral infection, flu for short