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Similarities:

1.Both are very small (measured in nanometers)

2.Both can cause disease, or are pathogens. Although some bacteria do not cause disease.

Differences:

1.Bacteria are present everywhere, including the human body.

2.Viruses need a host cell in order to live. They cannot replicate without a host cell.

3.Diseases caused by bacteria need antibiotics in order to rid the body of the bacteria.

While, viruses are not susceptible to antibiotics but they can sometimes be prevented by vaccines.

4. Bacteria have both DNA and RNA, while, viruses have DNA or RNA.

5. Bacteria are living organisms, while viruses are nonliving (Some scientists argue that viruses are living.

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14y ago

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