Multiple choice

Flu is........... infectious.

  1. hardly

  2. highly

  3. gradually

  4. honestly

  5. heartily
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

'Highly infectious' is correct. 'Highly' means very or extremely. When flu is described as 'highly infectious', it means it spreads very easily from person to person. This is standard medical terminology for contagious diseases.

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