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18.3 Viral Diseases KEY CONCEPT Some viral diseases can be prevented with vaccines. 18.3 Viral Diseases Viruses cause many infectious diseases • There are many examples of viral infections. – common cold Rhinovirus over 100 different types 18.3 Viral Diseases Viruses cause many infectious diseases • There are many examples of viral infections. – common cold – influenza 18.3 Viral Diseases Viruses cause many infectious diseases • There are many examples of viral infections. – common cold – influenza – SARS 18.3 Viral Diseases Viruses cause many infectious diseases • There are many examples of viral infections. – HIV • The body has natural defenses against viruses. HIV-infected white blood cell 18.3 Viral Diseases • A substance that stimulates the body’s own immune response against invasion by microbes. • • • • • • • • • Measles Mumps Rubella Influenza Chicken Pox Hepatitis Meningitis Polio Small Pox (not used anymore) • • Made from a weakened form of the virus itself. Triggers the body’s immune system to produce antibodies Memory cells “remember” the virus so future attacks can be prevented. • HIV (Aids) • Common cold • West Nile Virus
