ANDERSON, S.C. -- State health officials say the number of cases of whooping cough is increasing in the Upstate.

The Department of Health and Environmental Control said Tuesday the number of cases in Anderson County is higher than usual. A case has been confirmed at Clemson Elementary School in Pickens County.

Officials say the students at Clemson Elementary may have been exposed between Aug. 20 and Aug. 30.

Cases have been reported at five elementary schools in Anderson County.

Symptoms are similar to asthma in young people. They include coughing spells, a choking sensation and shortness of breath.

DHEC spokesman Jim Beasley says the vaccine given to children is about 85 percent effective. Beasley says the vaccine reduces the severity of the illness when children do get sick.