Researchers suspect this could be because of improperly cooked chicken. Chicken cooked on a grill tends to scorch quickly on the outside so you may think it's done, but it may still be rare inside. Remember, burned on the outside doesn't necessarily mean done on the inside. In that pink interior may be millions of bacteria, which can make you sick and possibly even send you to the hospital. One way to avoid this problem is to microwave your chicken until it is almost done, then take it immediately to the grill and cook it a few minutes more to get the grilled look and flavor.
Home is the only place to try that trick.
Never take partially cooked chicken to a picnic and finish cooking it there. You can make sure that chicken is done by using a meat and poultry thermometer. The chicken is cooked when the internal temperature hits 170 to 180 degrees. You may have heard about another possible danger from grilling. Some researchers at the National Cancer Institute believe that grilled foods may contain certain cancer-causing chemicals because of their exposure to flames and ashes.