1. Viruses

2. What is a virus? microscopic, nonliving particle
Invades and then reproduces inside a living cell.

3. Characteristics
Virus are not living.
Shapes: rod, round, spikey

4. How viruses multiply Attaches to a cell Injects DNA into cell
Takes over cell parts
Makes copies using cell parts
Breaks open the cell (cell dies)
Repeats on other cells
Step-by-Step: Virus Attacking Cell

5. Viral Diseases
AIDS
Chicken pox
Influenza

6. Viral Diseases
Measles
Polio
Rabies

7. Treatment for viruses No medications can cure viral infections.
Over-the-counter medications can treat symptoms.

8. Preventing Viruses Vaccine – prevents spread of some viral diseases.
Made from a dead or weakened virus.
This helps the body recognize the live virus when it comes in. Now it will be ready to attack it before it makes you sick.