I've never heard anything like that, but you must remember that it is body temperature that is important and it is never normally above ~37.5
Thee is actually a really interesting paper, tangentially related, on sepsis (blood borne infections) which randomised ICU patients to have either aggressive temperature management (ie fans, active cooling and paracetamol) vs allowing the temperature to rise as high as 39.9. Although the study was small in size(I think there were roughly 15 in each arm) the 'permitted fever' arm had only 2-3 fatalities vs 14 in the aggressive fever management arm. I actually have that paper on my desktop and will dig it up
Thee is actually a really interesting paper, tangentially related, on sepsis (blood borne infections) which randomised ICU patients to have either aggressive temperature management (ie fans, active cooling and paracetamol) vs allowing the temperature to rise as high as 39.9. Although the study was small in size(I think there were roughly 15 in each arm) the 'permitted fever' arm had only 2-3 fatalities vs 14 in the aggressive fever management arm. I actually have that paper on my desktop and will dig it up