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viroLOGICAL

#12 – Zoonosis From the Sea: Covert Mortality Nodavirus

April 29, 2026·16 min
Episode Description from the Publisher

A virus previously known only from shrimp farms and fish is now linked to a serious eye disease in humans. Covert Mortality Nodavirus (CMNV) has been detected in over half of fish samples and nearly two-thirds of crab samples tested at markets and a new study in Nature Microbiology (March 2026) connects it to a persistent form of viral uveitis that can permanently damage the optic nerve and lead to severe vision loss.

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