What happens when flies sit on our food and what should we do to prevent problems ? 1. Flies regurgitate their saliva to liquefy food before they suck it in , this is how infections spread . 2. Avoid eating uncovered foods , keep food covered at home and wash fruit before eating . 3. Build your immunity to reduce incidence of infections. #flies #infection #saliva #washfoods #coveredfoods | Sandy Jacob