West Nile virus cases are being diagnosed earlier than normal this year, in a warning sign that the US could face a large outbreak of the mosquito-borne illness.
Cases don't typically appear until July, experts say — but nine have already been recorded in 2024 across the US.
In and , both recorded their first cases in May — nearly two months ahead of schedule. , , , Michigan and have also recorded human cases, with being the latest — reporting its first on Wednesday.
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