Fever and Viruses

[aftabac]

Hi
there is an interesting question that i am putting here and that is
in immunology books we have read that in case of bacterial infection usually there is fever in the body and the purpose of fever or increase in temperature is that to lower the microbial load from the body, and to relax the body to some extent, and also the body could prepare will in the presence of low bacteremia.
but whey there is fever in case of viruses, is it the same case as with bacteria? to low the viral load, but how it is possible because the pathogenic bacteria have narrow temperature range of growth is it the same for viruses? but i donot think so.

need explaination...................................... ......

regards
aftab