Lawson also urged that teenage students get plenty of rest, take it easy, and follow doctors' orders.
Lawson's advice is consistent with advisories of Federal health officials, who say that H1N1 virus can have a serious or even deadly outcome for teens and others with stressed or compromised immune systems.
Meanwhile, employees at the school are doing their part to keep the disease transmission as low as possible, Lawson said.
Janitors are nightly wiping down desks, chairs, doorknobs, handrails and phones with disinfectant, he said.
Also, students are being urged to use hand-sanitizer dispensers that are stationed in school hallways, cafeterias, offices, and outside rest room doors, he said.
The flu outbreak is apparently isolated to Warrensburg and Thurman.
Officials at the public schools of neighboring Lake George, Bolton, and North Warren all reported that their attendance this week was well within a normal range.