Two football players tested positive for salmonella but health officials still aren't sure where they may have contracted the bacteria.
About 30 football players became ill a couple of days after attending a team dinner prepared by parents.
But that doesn't explain what made 70 other students sick who didn't attend the dinner.
All of them had symptoms of vomiting, diarrhea and upset stomachs.
Clearview Principal Franco Gallo ordered the school sanitized and, so far, no new cases have been reported.
Lorain County Health Commissioner Ken Pearce is hoping lab results from the Ohio Department of Health will answer the question on Wednesday.