Health officials returned to the Franklin Academy Charter School in Boynton Beach Thursday after about 30 children were sent home Wednesday due to an "outbreak of some kind."
"All we know is that it is gastro-intestinal and created problems. We have to look for dehydration factor, clean up. We have taken samples but we are also accumulating on that list all of the students names and contact the parents and see if we can tie things together," Palm Beach County Health Department spokesman Tim O'Connor said.
A school nurse alerted the Health Department about the illnesses.
Thursday's character parade and holiday parties were postponed until Monday.
The school sent an email which said it was encouraged by the fact that no new illnesses were reported on campus. However, it conceded enrollment was smaller than usual.
Many parents commenting on the PTO Facebook page said that they were keeping their children home today as a precaution. Several said that their children's symptoms included vomiting.
According to the school's email, classes will be canceled Friday to make sure the building is thoroughly cleaned and sanitized.
The school said it would make up the missing class day on March 24, 2014.
In addition to the Boynton Beach campus, Franklin Academy has campuses in Palm Beach Gardens, Pembroke Pines and Cooper City.