fever AE low-grade fever AE WEB: http://www.toyourhealth.com/mpacms/tyh/article.php?id=1521 The low-grade level of fever is beneficial. With most microbes/"bugs" that a child will be exposed to, this fever will assist the body in repelling the invader. YH low-grade fever AE is a fever adverse event with a temperature between 100° F and 102.2° F (37.8° C and 39° C).