fever AE moderate-grade fever AE YH moderate-grade fever AE is a fever adverse event with a temperature typically between 102.2° F and 104.5° F (39° C and 40° C). This moderate-grade fever temperature is still considered beneficial. If a child's body has reached this temperature, it's what's needed to kill whatever bacteria or virus their body is attempting to fight. WEB: http://www.toyourhealth.com/mpacms/tyh/article.php?id=1521