Immune system

1. part of the immune system, participating in both the innate and humoral immune responses
3. adapts to the virus to help fight to such infections
5. a protein produced by the body's immune system when it detects harmful substances, called antigens
11. Any substance that inhibits the growth and replication of a bacterium or kills it outright
13. A cell that is part of the immune system and helps the body fight infections and other diseases
14. cells that develop in the bone marrow
16. a mean by which the body is given immunity to a disease by intentional exposure to small quantities of it
19. acquired from exposure to the disease organism through infection with the actual disease
20. consist of both T cells and B cells to target specific antigens

2. a viral reproductive stage where the virus's DNA is replicated using the host cell's DNA
4. composed of cells to fight against foreign viruses first
6. The act of introducing a vaccine into the body to produce protection from a specific disease
7. when a person is given antibodies to a disease rather than producing them through his or her own immune system
8. results when exposure to a disease organism triggers the immune system to produce antibodies to that disease
9. the ability of bacteria to resist the effects of antibiotics
10. make antibiotics to help fight infections
12. infectious agent of small size and simple composition that can multiply only in living cells of animals, plants, or bacteria
15. a method by which a virus can replicate its DNA using a host cell
17. a complex network of organs, cells and proteins that defends the body against infection, whilst protecting the body's own cells
18. Any substance that causes the body to make an immune response against that substance