Virus is a microscopic organism that can replicate only inside the cell of the host organism. Most viruses are so tiny that they are only observable with at least conventional optical microscope.Virus can infect all types of organism such as plants and animals.
Examples of viruses:
influenza virus, bacteriophage, polio virus, measles virus and human immunodeficiency virus (HIV).
thank you po. may alam po ba kau tungkol sa computer virus?