Not all species of bats are studied in the same detail. Again, there are over 1000 different species of bats, and when it comes to the internal immune system they can have large differences between species.
Focusing on internal temperature during flight[0], there can be swings between species as drastic as "this would be a life threatening fever in a human" to "this counts as hypothermia in a human".
If not, it's an irrelevant level of detail for this context.
[0] https://get21stnight.com/2020/03/30/why-do-we-keep-getting-d...