Answer: How far is development affected by the health of the people ?
Step-by-step explanation:
''How far is development affected by the health of the people ?'' will be passive from the sentence in your question ''How far does the health of the people affect development?''
The sentence from your question is an active one and that is why it can be changed to a passive sentence.
Present Perfect Continuous Tense , Future Perfect Continuous Tense, and Past Perfect Continuous Tense cannot be changed to passive.