Body temperatures are currently lower, so the opposite of what you're suggesting with low grade fevers from overprescription of antibiotics. However, fevers ar

Body temperatures are currently lower, so the opposite of what you're suggesting with low grade fevers from overprescription of antibiotics. However, fevers are caused by a subset of the interleukin family, which as a whole causes inflammation. Inflammation was the author's suggestion. Also, low grade fevers aren't a thing. Fever is caused by the immune system. You can only have a continuous infection with diseases that avoid or supress the immune system. There are a small number of brain-affecting infectious diseases like meningitis that can raise body temperature on their own. Chronically recurring stuff will also give you intermittent fevers, but there's no low-grade. You have it or you don't.