Action News Jax has learned about 19 students and a teacher were sent home sick from Creekside High School on Thursday.
The St. Johns County School District believes there is a stomach illness going around.
Action News Jax’s Elizabeth Pace called nearby hospitals to ask if they have seen an increase in stomach flu or viruses this week and is waiting to hear back.
The illness led to the cancellation of Thursday night’s Creekside Lady Knights basketball game.
Click here to read the school district's set of guidelines on how to prevent the spread of an illness.