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Parents are being warned to look out for the signs of a common childhood respiratory illness, RSV, cases of which unusually appear to be rising rapidly in the summer.
RSV is a very common winter virus - but social distancing and lockdowns kept it at bay earlier this year.
And this means young children have not been exposed and developed immunity.
Public Health England said it would just cause mild illness for most but some under-twos were at higher risk.
These can include infants born prematurely or with a heart condition.
And they can be at risk of more serious complications, including breathing difficulties caused by bronchiolitis.
Government strategy promises improved support for autistic children
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An early winter of viruses is coming – so here s how to protect your family
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