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According to the latest statistics released by the CDC, the flu is on the rise in much of the country.
The agency says 19 states now have high levels of flu activity and the number of children who have died because of the flu is 13.
Children are particularly vulnerable to H1N1, this year’s predominant flu strain.
CDC officials say it’s not too late for children or adults to get vaccinated.
The flu season began in October and runs through May.