Crossword

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Across
  1. 2. The pathogen which causes the flu
  2. 4. Another word for flu
  3. 6. A symptom which lets your body temperature rise higher than normal.
Down
  1. 1. A drug used to treat the flu
  2. 3. A sudden burst of air expelled from the lungs through the nose and mouth
  3. 5. How many types of influenza viruses are there?
  4. 6. A state of tiredness
  5. 7. A preventive measure to protect against the influenza virus.