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

– influenza

Viruses cause many infectious diseases

• There are many examples of viral infections.– common cold

18.3 Viral Diseases

– influenza

Viruses cause many infectious diseases

• There are many examples of viral infections.– common cold

– SARS

18.3 Viral Diseases

– HIV

HIV-infected whiteblood cell

Viruses cause many infectious diseases

• There are many examples of viral infections.

• The body has natural defenses against viruses.

18.3 Viral Diseases

A substance that stimulates the body’s own immune response against invasion by microbes.

• 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.

• Measles • Mumps• Rubella• Influenza• Chicken Pox• Hepatitis• Meningitis• Polio• Small Pox (not used anymore)

• HIV (Aids)• Common cold• West Nile Virus