http://www.scigallery.org/blogger/ Free science images and resources for education http://www.scigallery.org/blogger/images/button.gif http://www.scigallery.org/blogger/ Students helping other students... 88 31 http://www.scigallery.org/blogger/modules/sections/index.php?op=viewarticle&artid=2 What exactly is a virus? How does it differ from bacteria? Why is SARS such a threat to global health? .......Bacteria and viruses can cause many diseases, but the distinction between the two forms of...