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DIDAVISION


VIRUSES


VIRUSES
VIRUSES

Louis Pasteur and his fight against micro-organisms. The first appearance of the Electro-microscope. Nature of viruses and their composition. Viral infections, how they begin and their development. Viral illnesses. Summary.


INTRODUCTION
In 1918 the influenza developed and left 15 million dead.
Pharaoh Ramses V died of smallpox.
Edward Jenner created the first vaccine against smallpox

VIRAL CHARACTERISTICS
Viruses have no sexual organs so they cannot move or reproduce themselves.
What are viruses? How do they reproduce themselves?
Composition of viruses. Parasites.

VIRAL INFECTIONS
Each virus is specialised in attacking one determined bacteria or cell in an organism.
How do viruses spread?
The organismís immunological system. Antibodies. The virus that causes AIDS attacks precisely those cells in the body which are in charge with its defence,

VIRAL ILLNESSES
Antibodies.
Flues and common colds.
Pasteur discovered a vaccine against rabies.
Vaccine against poliomyelitis. Roosevelt.
AIDS. Blood and sperm are the main vias of infection.
Genetic Engineering is unravelling the secrets of living matter.

SUMMARY

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