QUESTION TYPE: Most Strongly Supported
- Birds and mammals can only catch West Nile from mosquito bites.
- Mosquitos can catch West Nile only from biting animals.
- Humans can catch West Nile, but they can’t spread it to mosquitos.
- West Nile started in north Africa, and spread to North America.
ANALYSIS: It’s fairly strongly supported that there are animals in North America capable of spreading the West Nile virus.
West Nile virus is in North America, and humans can’t spread it. Mosquitos can’t spread it on their own, so something else is spreading it. We know that animals can help mosquitos spread the virus.
- West Nile could definitely be common. Humans can’t spread the virus directly, but if enough animals spread West Nile it could become common among humans too.
- Hard to say. West Nile only spread to North America recently. So perhaps the virus is only present in New England, but the densest concentration of mosquitos is in Louisiana, where the virus hasn’t reached yet.
- The stimulus doesn’t mention symptoms. We have no idea if people can catch the virus and not show symptoms.
- The virus started in North Africa. But it might affect more people in North America. Perhaps it spreads easier here. We have no idea, really.
- CORRECT. This is probably true. Humans can’t spread the virus to mosquitos, and mosquitos are the ones that spread the virus.
It’s likely that an infected animal arrived, and spread the virus to mosquitos.
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