1. Viruses

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

3. Viruses are Nonliving Viruses are not cells Viruses do not: Use energy
Grow
Respond to their surroundings
Make food
Produce wastes

4. How viruses multiply Attaches to a cell
Injects genetic material into cell
Takes over cell parts
Makes copies using cell parts
Breaks open the cell
Repeats on other cells

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 altered virus.
If the virus enters the body, it is destroyed before it can produce disease.