The Montgomery County Office of Public Health has identified an increase in cases of pertussis, also
known as whooping cough, at Plymouth Whitemarsh High School.
The department said symptoms include a runny nose, sudden, uncontrollable bursts or spells of coughing, and a persistent cough that sometimes causes vomiting.
If your child has symptoms, they should stay home from school and activities, according to health officials.
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Officials also recommended making sure your family's pertussis vaccinations are up to date.
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