Is it really normal for fever of 40 to be the new norm?

My girl has always been falling sick often. She gets hospitalized annually due to high fever. First time was due to Roseola and the rest are virus with bacteria infection. Just today, her fever reached 40.7 degrees again. Heard from other moms that 40degrees is quite common for the younger generations. Even the Doctor at A&E mentioned that 40 degrees is now the norm. We have tried Multivitamins, Biogaia, Immuped, Elderberry supplement, Kaluba, Korean Jelly supplement. Maybe it did help but they are all not formidable against viruses else we would not need Doctors and medication anymore. What's your thoughts on 40 degrees being the new norm for fever?