An outbreak of pertussis, otherwise known as the whooping cough, has been reported among students in the Sibley East School District. Pertussis may begin with a runny nose, sneezing, mild cough, and possibly a low-grade fever, but after a week or two the cough worsens and begins to occur in sudden, uncontrollable bursts. These coughing attacks can end in vomiting and-or a high-pitched whooping noise, and can last up to three months. Protection from the pertussis vaccination disappears over time. For this reason, pertussis occurs in adults, adolescents and school-aged children who may have been fully vaccinated in the past. Symptoms of pertussis may be milder in adults and older children who can unknowingly pass on the disease to infants who are at risk for more severe illness. Health officials encourage adults and children 10-18 years old to make sure they are up-to-date on their T-dap vaccination. Contact your healthcare provider if someone in your family has had contact with someone with pertussis or has been coughing for 7 days or longer.