16, 2011 -- If you've been bitten by a mosquito and feel ill, it could be West Nile virus. Ever since its 1999 appearance in the US, reports of West Nile illness have peaked in August. With a two- to 14-day incubation period, the next infection might ... West Nile Virus in 15 States
2011年8月17日星期三
West Nile Virus in 15 States
16, 2011 -- If you've been bitten by a mosquito and feel ill, it could be West Nile virus. Ever since its 1999 appearance in the US, reports of West Nile illness have peaked in August. With a two- to 14-day incubation period, the next infection might ... West Nile Virus in 15 States
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