BIRD FLU

8. produced by the body's immune system to fight bacteria, viruses and other antigens
9. Highly lethal; causing severe illness or death
10. A preparation (of a dead or weakened organism or parts of it) that when administered to the body induces immunity and thereby protects the body against subsequent infection by that organism
11. A person who is infected with an agent that causes a disease but shows no sign of illness
12. An organism on or in which a parasite lives

1. A disease that is easily spread from one person to another
2. A disease that can be transmitted from animals to humans
3. A genetic change (DNA or RNA) that produces new traits which can be inherited
4. Drugs that are used to prevent or cure a disease caused by a virus, by interfering with the ability of the virus to multiply in number or spread from cell to cell
5. Outbreak of a disease that affects a large number of individuals within a population or region at the same time
6. Worldwide outbreak of a disease
7. A foreign substance that can trigger an immune response and cause the body to produce antibodies. The substance may be whole disease-causing organisms (dead or weakened) or parts of these organisms
11. To kill a large number of animals to prevent the spread of disease