define bacteria and viruses
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Bacterial and viral infections have many things in common. Both types of infections are caused by microbes -- bacteria and viruses, respectively -- and spread by things such as: Coughing and sneezing. Contact with infected people, especially through kissing and sex. Contact with contaminated surfaces, food, and water.
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Bacteria have ribosomes whereas viruses do not. Bacteria are unicellular but viruses are not (because they are considered as nonliving) Bacteria has DNA and RNA floating freely in cytoplasm, it has a cell wall and a cell membrane, whereas a virus is simply DNA or RNA enclosed within a coat of protein.
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