Snohomish County health officials are trying to slow the spread of whooping cough by offering free vaccinations to low-income adults at risk of contracting the disease.

Snohomish County health officials are trying to slow the spread of whooping cough by offering free vaccinations to low-income adults at risk of contracting the disease.

The Daily Herald reports ( http://is.gd/5VY4K3) about 450 doses will be available from the health district Saturday in Everett and Marysville.

Snohomish County typically has 24 to 45 cases of whooping cough a year. So far it already has 51.

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Information from: The Daily Herald, http://www.heraldnet.com