WHAT IS WEST NILE VIRUS?
West Nile virus is a disease spread by mosquitoes.
It was first diagnosed in Uganda in 1937, but no cases were reported in the U.S. until 1999 in New York.
The virus gradually spread across the country.
Only about one in five infected people report feeling unwell. Early symptoms can include fever, headache and body aches.
Some recover in a matter of days.
But one in 150 infected people will develop severe symptoms including neck stiffness, disorientation, coma and paralysis.
Cases in the UK are caused by bites abroad
'The few cases of West Nile virus diagnosed in the UK have been due to insect bites abroad and the risk of contracting the infection in this country is low.'
Public Health England monitors mosquito populations around the UK and regularly checks for new species.
It says the C. modestus species has not been found outside of the south east.
Dr Medlock added: 'The majority of people infected with West Nile virus do not develop symptoms but those that do will experience a mild, flu like illness and rash lasting up to six days.
'Those over 50 and with underlying health conditions are at higher risk of more severe disease.
'People can avoid insect bites by using insect repellent and wearing tops with long sleeves.'
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