Byrom Elementary school in Tualatin has had two confirmed cases of whooping cough this year.
On Tuesday, the school's principal sent a letter home to parents advising them to be on the lookout for whooping cough symptoms, which can include a severe cough that lasts for weeks or even months.
The note also urged parents to get their children vaccinated and directed them to the Washington County Health Department for more information.
Whopping cough, which is also known as pertussis, can be life threatening for children under 1 year of age.
The most effective way to prevent it is for children, teens and adults to be fully up to date on pertussis vaccines.
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