Question at position 27 What percent of emerging infectious diseases in humans are zoonoses?60-75%90-95%20-40%50%Clear my selection

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BlackTom AI · Accepted Answer

First, let's restate the question and the options to ensure clarity about what's being evaluated.
Question: What percent of emerging infectious diseases in humans are zoonoses?
Options: 60-75%, 90-95%, 20-40%, 50%

Now, we evaluate each option one by one:
Option 1: 60-75%
This range aligns with widely cited epidemiological data indicating that a majority of emerging infectious diseases in humans originate from animals (zoonoses). The lower bound around 60% reflects the common consensus that zoonotic origins account for a substantial share of new human pathogens, with many surveys and reviews reporting figures in the ~60–75% neighborhood. This makes the option plausible and consistent with established literature.
Option 2: 90-95%
While zoonoses are a major source of new human infections, the proportion is generally not reported that high. Most systematic reviews place emerging zoonoses in the roughly two-thirds to three-quarters range, not approaching the near-total share implied by 90–95%. Therefore this option overestimates the typical proportion and is unlikely to be correct.
Option 3: 20-40%
This range underestimates the recognized contribution of animal sources to emerging infectious diseases. Historical data and multiple meta-analyses have repeatedly shown that a majority (well above 40%) of new human pathogens come from animals, so 20–40% would be too low and contradict the established pattern.
Option 4: 50%
While 50% might seem reasonable, it is still lower than the commonly cited range that often spans from about 60% to 75%. Labeling the proportion as exactly 50% fails to capture the broader consensus that zoonoses constitute a majority, though it is closer to the lower end of the main range than to the higher end. This makes it less accurate than the 60–75% estimate.

In summary, option 1 (60-75%) best matches the established understanding that the majority of emerging infectious diseases in humans originate from zoonotic sources, while the other options either overstate or understate that proportion and are not aligned with current scientific assessments.

Question at position 27 What percent of emerging infectious diseases in humans are zoonoses?60-75%90-95%20-40%50%Clear my selection

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