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KEY CONCEPT Some viral diseases can be prevented with vaccines.

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Presentation on theme: "KEY CONCEPT Some viral diseases can be prevented with vaccines."— Presentation transcript:

1 KEY CONCEPT Some viral diseases can be prevented with vaccines.

2 Viruses cause many infectious diseases
There are many examples of viral infections. common cold

3 Viruses cause many infectious diseases
There are many examples of viral infections. common cold influenza

4 Viruses cause many infectious diseases
There are many examples of viral infections. common cold influenza SARS

5 Viruses cause many infectious diseases
There are many examples of viral infections. HIV HIV-infected white blood cell The body has natural defenses against viruses.

6 Vaccines are made from weakened pathogens.
A vaccine stimulates the body’s own immune response. Vaccines prepare the immune system for a future attack. Vaccines are the only way to control the spread of viral disease.

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