explain the difference between bacteria and virus. and explain why antibiotics don't work
Antibiotics are useless against viral infections. This is because viruses are so simple that they use their host cells to perform their activities for them. So antiviral drugs work differently to antibiotics, by interfering with the viral enzymes instead.
A virus is little more than a section of RNA or DNA covered by a protein shell. A bacterium, therefore, is at least a hundred times larger than a typical virus. One major difference between viruses and bacteria is the method of reproduction. A bacterium is a completely self-contained and self-reproducing unit. When the time is right, a bacterium will split its DNA and RNA genetic material in two.