A spokesperson said the county was notified about the case at Upper Merion High School on Monday. School administrators were provided with guidance and a letter to send to the sch

Upper Merion High School sent a letter home to parents earlier this week alerting them to a case of whooping cough in the school. But according to Montgomery County health officials, cases are actually on the decline.

The medical term for whooping cough is pertussis, which is a highly contagious bacterial infection that can be spread through coughing or sneezing.