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题目
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Question at position 9 Why is herd immunity important?It keeps cattle healthyIt protects vulnerable populations (babies, elderly, immunocompromised) from diseases that they cannot be vaccinated against It slows or stops the spread of disease in a populationBoth answers 2 and 3Clear my selection

选项
A.It keeps cattle healthy
B.It protects vulnerable populations (babies, elderly, immunocompromised) from diseases that they cannot be vaccinated against
C.It slows or stops the spread of disease in a population
D.Both answers 2 and 3
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思路分析
Start by listing what each option claims about herd immunity so you can compare them clearly. Option 1: 'It keeps cattle healthy' — This is misleading for herd immunity in humans. Herd immunity concepts apply to human populations and vaccination coverage to protect people, not livestock health. The state......Login to view full explanation

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