<span>A bacterial disease is caused mainly by bacteria or
bacterial components and is highly contagious. Disease happens mostly when the
abnormal number of bacteria present on the body exceeds its threshold. On the
other hand, a viral disease occurs when one’s body is invaded by pathogenic
viruses that normally attacks susceptible cells (common when one’s immune
system is weak). Since they originated from two different sources, the treatment
is very different. For bacterial diseases, it is being treated by using
antibiotics specific for the bacteria present in the body. However, for a viral
disease, antibiotics will have no effect on viruses, hence, antiviral drugs
have been developed. </span>
