Los Angeles Health Dept Shuts Down Camps

I know a few people that work for camps in Los Angeles County. Camps in this area have received letters from the LA County Health Dept informing them that anytime they have more than 5 campers with flu like symptoms/fevers that they need to report it to the Health Dept. The Health dept then shut the camp down once the nurse reported that she had several campers/staff with fevers and flu symptoms. They had to send all the campers/staff home. Anyone else dealing with this situation?