thanks for using health care magic
in most cases indicates an infection which could be
bacterial or parasitic like in the case of malaria
It would have been more helpful if you listed all the tests
you have done so far and the results.
is an important test to rule out bacterial
infections together with white blood cell
The malaria test you did, if it was microscopy then there is
a chance of having a false negative result unlike if the test
that was done was a rapid diagnostic test.
You should do C-reactive protein test, if its positive with an
elevated white blood cell then its a bacterial infection. On
the other hand if they are negative then you should do a
rapid test and consider treating for malaria.
Rare causes of fevers are tumors.
Hope this helps you.