I have autonomic neuropathy with temperature dysregulation. My normal body temp is about 97.2. I still increase temps during an illness, but it's lower then normal. For example a temperature of 99 is a significant fever for me, whereas it's barely over normal and might be considered only low-grade fever for most.

Everyone is different and it just depends on what is 'normal' for you. Some will still have normal temperature increases during illness.