Merck Manual

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The transmission cycle of West Nile virus. Mosquitoes are the disease vector, and birds are the reservoir hosts. Horses and people are incidentally infected.
The transmission cycle of West Nile virus. Mosquitoes are the disease vector, and birds are the reservoir hosts. Horses and people are incidentally infected.
The transmission cycle of West Nile virus. Mosquitoes are the disease vector, and birds are the reservoir hosts. Horses and people are incidentally infected.