A local school district is warning parents three students have tested positive for whooping cough.
Hanover-Horton administrators sent a letter home this week telling parents an eighth-grader and two siblings have it. All three were up-to-date with their vaccines and booster shots.
Custodians sprayed down the district's buildings Thursday night. Administrators are asking parents to watch out for symptoms in their children.
Anyone who has whooping cough needs to be on antibiotics for at least five days before returning to school.
Whooping cough starts with the same symptoms as the common cold. It gets more serious after a week or two. It can be deadly for young children and the elderly.
Most kids get five doses of the vaccine before starting school. Doctors recommend a booster after age 10.